Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others.

Optical Cylinder Lens Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others. Worldhawk can offer cylinder Lenses include convex cylindrical lens, concave cylindrical lens, meniscus cylindrical lens, and doublet achromatic cylindrical lens ect. Choose from N-BK7 glass, UV fused silica, or CaF2, all of which are available uncoated or with an antireflection coating. Worldhawk can provide various kinds of cylindrical lens with high precision, We are proud to be one of the few suppliers can detection the radius and flatness about the cylindrical lens in China. Absolutly can ensure all the products are qualified. Specifications

Plano-convex Cylindrical Lens Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others.   Worldhawk can offer cylinder Lenses include convex cylindrical lens, concave cylindrical lens, meniscus cylindrical lens, and doublet achromatic cylindrical lens ect. Choose from N-BK7 glass, UV fused silica, or CaF2, all of which are available uncoated or with an antireflection coating. Worldhawk can provide various kinds of cylindrical lens with high precision, We are proud to be one of the few suppliers can detection the radius and flatness about the cylindrical lens in China. Absolutly can ensure all the products are qualified. Specifications Material  N-bk7, H-K9L, Fused Silica, N-SF10, Silicon, CaF2, Sapphire etc. Length 2~300mm Centration ＜3 arc min Height 2 ~300mm Clear Aperture >90% Radius > 1.5mm Flatness (per 25mm at 632.8nm) <1.5Lambda (General), <1/4Lambda (High Precision) Center Thickness > 0.5mm Irregularity of Fringes 0.2-0.5 Lambda Focal Length 3~3000mm Surface Quality(S/D) 60/40, 40/20 or better Size Tolerance(mm) +/-0.1mm, +/-0.05mm Chamfer <0.25mmx45 degree Center Thickness Tolerance(mm) +/-0.1mm, +/-0.05mm Coating Uncoated, AR, BBAR, Reflective Focal Length Tolerance(mm) ±1% Design Wavelength 632.8 nm                

Plano-convex Cylindrical Lens Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others. Worldhawk can offer cylinder Lenses include convex cylindrical lens, concave cylindrical lens, meniscus cylindrical lens, and doublet achromatic cylindrical lens ect. Choose from N-BK7 glass, UV fused silica, or CaF2, all of which are available uncoated or with an antireflection coating. Worldhawk can provide various kinds of cylindrical lens with high precision, We are proud to be one of the few suppliers can detection the radius and flatness about the cylindrical lens in China. Absolutly can ensure all the products are qualified. Specifications Material  N-bk7, H-K9L, Fused Silica, N-SF10, Silicon, CaF2, Sapphire etc. Length 2~300mm Centration ＜3 arc min Height 2 ~300mm Clear Aperture >90% Radius > 1.5mm Flatness (per 25mm at 632.8nm) <1.5Lambda (General), <1/4Lambda (High Precision) Center Thickness > 0.5mm Irregularity of Fringes 0.2-0.5 Lambda Focal Length 3~3000mm Surface Quality(S/D) 60/40, 40/20 or better Size Tolerance(mm) +/-0.1mm, +/-0.05mm Chamfer <0.25mmx45 degree Center Thickness Tolerance(mm) +/-0.1mm, +/-0.05mm Coating Uncoated, AR, BBAR, Reflective Focal Length Tolerance(mm) ±1% Design Wavelength 632.8 nm

Micro Cylindrical Lens Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others. Worldhawk can offer cylinder Lenses include convex cylindrical lens, concave cylindrical lens, meniscus cylindrical lens, and doublet achromatic cylindrical lens ect. Choose from N-BK7 glass, UV fused silica, or CaF2, all of which are available uncoated or with an antireflection coating. Worldhawk can provide various kinds of cylindrical lens with high precision, We are proud to be one of the few suppliers can detection the radius and flatness about the cylindrical lens in China. Absolutly can ensure all the products are qualified. Specifications Material  N-bk7, H-K9L, Fused Silica, N-SF10, Silicon, CaF2, Sapphire etc. Length 2~300mm Centration ＜3 arc min Height 2 ~300mm Clear Aperture >90% Radius > 1.5mm Flatness (per 25mm at 632.8nm) <1.5Lambda (General), <1/4Lambda (High Precision) Center Thickness > 0.5mm Irregularity of Fringes 0.2-0.5 Lambda Focal Length 3~3000mm Surface Quality(S/D) 60/40, 40/20 or better Size Tolerance(mm) +/-0.1mm, +/-0.05mm Chamfer <0.25mmx45 degree Center Thickness Tolerance(mm) +/-0.1mm, +/-0.05mm Coating Uncoated, AR, BBAR, Reflective Focal Length Tolerance(mm) ±1% Design Wavelength 632.8 nm

Meniscus Cylindrical Lens Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others.   Worldhawk can offer cylinder Lenses include convex cylindrical lens, concave cylindrical lens, meniscus cylindrical lens, and doublet achromatic cylindrical lens ect. Choose from N-BK7 glass, UV fused silica, or CaF2, all of which are available uncoated or with an antireflection coating. Worldhawk can provide various kinds of cylindrical lens with high precision, We are proud to be one of the few suppliers can detection the radius and flatness about the cylindrical lens in China. Absolutly can ensure all the products are qualified. Specifications Material  N-bk7, H-K9L, Fused Silica, N-SF10, Silicon, CaF2, Sapphire etc. Length 2~300mm Centration ＜3 arc min Height 2 ~300mm Clear Aperture >90% Radius > 1.5mm Flatness (per 25mm at 632.8nm) <1.5Lambda (General), <1/4Lambda (High Precision) Center Thickness > 0.5mm Irregularity of Fringes 0.2-0.5 Lambda Focal Length 3~3000mm Surface Quality(S/D) 60/40, 40/20 or better Size Tolerance(mm) +/-0.1mm, +/-0.05mm Chamfer <0.25mmx45 degree Center Thickness Tolerance(mm) +/-0.1mm, +/-0.05mm Coating Uncoated, AR, BBAR, Reflective Focal Length Tolerance(mm) ±1% Design Wavelength 632.8 nm              

Optical Mirrors High-quality optical mirrors are available for use with light throughout the UV, VIS, and IR spectral regions. Worldhawk offers a range of laser, flat, metal substrate, focusing, or specialty Optical Mirrors . In a multitude of reflective coating options, including Protected Aluminum, Enhanced Aluminum, Protected Silver, Protected Gold, or Dielectric. Choosing the proper reflective coating option ensures high reflectivity of the needed wavelength or wavelength range. We can provide the professional customized service, welcome to send inquiry and we will reply within 24 hours. Specifications

Optical Mirror with Protective Silver Coating   In the visible to near-infrared spectral range, silver coating mirrors have the highest reflectivity of all the metal mirrors, and silver coating mirrors also have high reflectivity in the infrared band.   Worldhawk offers a range of laser, flat, metal substrate, focusing, or specialty Optical Mirrors . In a multitude of reflective coating options, including Protected Aluminum, Enhanced Aluminum, Protected Silver, Protected Gold, or Dielectric. Choosing the proper reflective coating option ensures high reflectivity of the needed wavelength or wavelength range. We can provide the professional customized service, welcome to send inquiry and we will reply within 24 hours. Specifications    Reflection     Protected Aluminum Ravg>90% 0.4-0.7μm Enhanced Aluminum Ravg>92% 0.45-0.65μm Protected Silver Ravg>95% 0.5-0.8μm, Ravg>95% 2-10μm Protected Gold Ravg>95% 0.8-2μm, Ravg>84% 0.7-0.8μm Dielectric Mirror Coatings Ravg >99.99% >400nm   Mirror shape Plano Mirrors, Cylindrical Mirrors, Prism Mirrors,  Spherical Mirrors, Aspherical Mirrors,  Elliptical Mirrors, Cone Mirrors,  Right Angle Prism Mirrors   Category Flat Mirrors, Laser Line Mirrors, IR Mirrors, Focusing (Concave) Mirrors, Hot and Cold Mirrors,  Backside Polished Mirrors and Specialty Mirrors.   Substrates H-K9L(N-BK7), Fused Silica, Si, Ge, Sapphire,  Copper, Aluminum   Diameter 1-250mm or customize   Dia. tolerance +/-0.1mm, +/-0.01mm   Surface Flatness lambda/4 , lambda/2   AOI 0°,45°,60° or customer requests   Chamfer 0.1~0.3mm x 45degree   Clear Aperture > 90%   Surface Quality 60/40, 40/20   

Protected Gold Coating Mirror High-quality optical mirrors are available for use with light throughout the UV, VIS, and IR spectral regions. Choosing the proper reflective coating option ensures high reflectivity of the needed wavelength or wavelength range. We can provide the professional customized service, welcome to send inquiry and we will reply within 24 hours.   Category  Flat Mirrors   Laser Line Mirrors   IR Mirrors  Focusing Mirrors  (Concave Mirror)   Hot and Cold Mirrors   Backside Polished  Mirrors  Front Surface Mirror  Category  Plano Mirrors  Cylindrical Mirrors  Prism Mirrors   Spherical Mirrors  Aspherical Mirrors   Elliptical Mirrors  Cone Mirrors   Right Angle Prism Mirrors    Reflection    Protected Aluminum  Ravg>90% 0.4-0.7μm  Enhanced Aluminum  Ravg>92% 0.45-0.65μm, Ravg>90% 0.19-0.4μm  Protected Silver  Ravg>95% 0.5-0.8μm, Ravg>95% 2-10μm  Protected Gold  Ravg>95% 0.8-2μm, Ravg>84% 0.7-0.8μm  Dielectric Coatings Mirror   Ravg >99.99% >400nm, Ravg >99.99% 0.25-0.4μm  Substrates  H-K9L(N-BK7), Fused Silica, Si, Ge, Sapphire,   Copper, Aluminum  Diameter  3-250mm or customization  Dia. tolerance  +/-0.1mm, +/-0.01mm  Surface Flatness  lambda/4 , lambda/2, lambda/10  Parallelism  3'  AOI  0°-45°  Clear Aperture  > 90%

Micro Optical Mirrors  Worldhawk offers standard and high precision optical metallic(Au,Ag,Al) mirrors, rectangular and custom shape and size with different optical glass substrate.  Au  (Gold) coating:   Ravg> 95% @ 600nm-12.0um Ag  (Silver) coating: Ravg> 95% @ 600nm-10.0um Al  ( Aluminum ) coating: Ravg> 90% @ 400nm-2400nm  Strengthen aluminium :    Ravg> 92% @ 450nm-650nm Substrate: K9L(BK7), fused silica, sapphire, float glass, ect.. Application:     It can be widely used on stage laser light, laser high -mirror stage engineering , anti- reflective high power laser systems, high -precision optical instruments , digital microscope , laser Mada Zhen mirror projector optical engine , galvanometer laser barcode scanners , copiers, laser printers, digital cameras, optical analysis equipment , RGB projectors, rear projection TV .etc..   Parameter:  Reflection    R> 90%, >92% Clear Aperture  > 90% AOI  0deg or 45deg Wavelength  400-2400nm Dimensions tolerance  +/-0.1mm Parallelism  < 3min Surface Flatness  lambda/4

Laser Mirrors with VBH Pad   High-quality optical mirrors are available for use with light throughout the UV, VIS, and IR spectral regions. Worldhawk offers a range of laser, flat, metal substrate, focusing, or specialty Optical Mirrors . In a multitude of reflective coating options, including Protected Aluminum, Enhanced Aluminum, Protected Silver, Protected Gold, or Dielectric. Choosing the proper reflective coating option ensures high reflectivity of the needed wavelength or wavelength range. We can provide the professional customized service, welcome to send inquiry and we will reply within 24 hours. Specifications    Reflection     Protected Aluminum Ravg>90% 0.4-0.7μm Enhanced Aluminum Ravg>92% 0.45-0.65μm Protected Silver Ravg>95% 0.5-0.8μm, Ravg>95% 2-10μm Protected Gold Ravg>95% 0.8-2μm, Ravg>84% 0.7-0.8μm Dielectric Mirror Coatings Ravg >99.99% >400nm   Mirror shape Plano Mirrors, Cylindrical Mirrors, Prism Mirrors,  Spherical Mirrors, Aspherical Mirrors,  Elliptical Mirrors, Cone Mirrors,  Right Angle Prism Mirrors   Category Flat Mirrors, Laser Line Mirrors, IR Mirrors, Focusing (Concave) Mirrors, Hot and Cold Mirrors,  Backside Polished Mirrors and Specialty Mirrors.   Substrates H-K9L(N-BK7), Fused Silica, Si, Ge, Sapphire,  Copper, Aluminum   Diameter 1-250mm or customization   Dia. tolerance +/-0.1mm, +/-0.01mm   Surface Flatness lambda/4 , lambda/2   AOI 0deg or 45deg   Chamfer 0.1~0.3mm x 45degree   Clear Aperture > 90%   Surface Quality 60-40, 40-20 or better  

Optical Concave Mirrors  High-quality optical mirrors are available for use with light throughout the UV, VIS, and IR spectral regions. Worldhawk offers a range of laser, flat, metal substrate, focusing, or specialty Optical Mirrors . In a multitude of reflective coating options, including Protected Aluminum, Enhanced Aluminum, Protected Silver, Protected Gold, or Dielectric. Choosing the proper reflective coating option ensures high reflectivity of the needed wavelength or wavelength range. We can provide the professional customized service, welcome to send inquiry and we will reply within 24 hours. Specifications    Reflection     Protected Aluminum Ravg>90% 0.4-0.7μm Enhanced Aluminum Ravg>92% 0.45-0.65μm Protected Silver Ravg>95% 0.5-0.8μm, Ravg>95% 2-10μm Protected Gold Ravg>95% 0.8-2μm, Ravg>84% 0.7-0.8μm Dielectric Mirror Coatings Ravg >99.99% >400nm   Mirror shape Plano Mirrors, Cylindrical Mirrors, Prism Mirrors,  Spherical Mirrors, Aspherical Mirrors,  Elliptical Mirrors, Cone Mirrors,  Right Angle Prism Mirrors   Category Flat Mirrors, Laser Line Mirrors, IR Mirrors, Focusing (Concave) Mirrors, Hot and Cold Mirrors,  Backside Polished Mirrors and Specialty Mirrors.   Substrates H-K9L(N-BK7), Fused Silica, Si, Ge, Sapphire,  Copper, Aluminum   Diameter 3-250mm or customization   Dia. tolerance +/-0.1mm, +/-0.01mm   Surface Flatness lambda/4 , lambda/2   AOI 0deg or 45deg   Chamfer 0.1~0.3mm x 45degree   Clear Aperture > 90%   Surface Quality 60-40, 40-20 or better  

Optical Shortpass Filter Worldhawk can provide precision filters for many applications, including bandpass interference filter, Cut off filters, UV bandpass filter, Narrow bandpass filter, ND filter, Negative Filter or Notch filters, dichroic, color substrate. Optical Filters are used to selectively transmit or reject a wavelength or range of wavelengths. Optical Filters are used in applications such as fluorescence microscopy, clinical chemistry, spectroscopy, or machine vision inspection. Optical Filters are ideal for life science, imaging, industrial, or defense industries. Custom filters are available for both large manufacturing needs and in prototype volumes. Contact us for more information to arrange a quote. Cut Off filters  - Dichroic Filter - Longpass Edge Filters   ( Long pass Filters) - Shortpass Edge Filters   ( short pass Filters) - IR Cut Filters   ( IR-CUT Filter) - UV-IR Cut Off Filters   Longpass Filters transmit wavelengths greater than the cut-on wavelength, while Shortpass Filters transmit wave-  lengths shorter than the cut-off wavelength. Dichroic filters perform the same function, while guaranteeing that the  rejected wavelengths are reflected. Any of these filters can be designed for 0  or 45  angle of incidence. Edge and Di- chroic Filters are commonly used in Fluorescence instrumentation, Heat Rejection Applications, and as Color Filters.  While somewhat angle sensitive, they are more forgiving than bandpass interference filters.  Shortpass Edge Filters Transmission UV, reflection IR Material:BK7 upon request Transmission:>90% Blocking:OD3-OD6 Incidence Angle:0°±5°or 45°±5° Surface Quality:20-10 Clear Aperture:>90%

IR Bandpass Filters Optical color glass can selectively transmit special wavelength of light, or a portion of wavelengths in a continuous spectrum, or reduce transmission evenly across visible spectrum by absorbing or reflecting the portion of the light that is not being transmitted. Optical color glass is also called Colored optical glass filters. It is mainly used as filters for observing, photograph, infrared instrument in order to improve the visibility or meet special spectrum requirements. It can be also made into colored glasses. Worldhawk can provide various color glass filters or its substitutes.Include cut-off type glass filter, selective absorption type glass filter, heat-absorbing glass and neutral grey colored glass.   Bandpass fIlters - Bandpass filters - Narrow bandpass filter - UV bandpass filter - IR Bandpass filter Technique Data:  FWHM: 30nm-80nm OD:2-3 FWHM: 5nm-25nm OD:4-6 Size: φ6-φ200 Center Wavelength Range:340-1064nm (340 380 405 450 492 510 546 578 600 620 630 808 850 940 1064...)    

Optical Glass Longpass Filter  Worldhawk can provide precision filters for many applications, including bandpass interference filter, Cut off filters, UV bandpass filter, Narrow bandpass filter, ND filter, Negative Filter or Notch filters, dichroic, color substrate. Optical Filters are used to selectively transmit or reject a wavelength or range of wavelengths. Optical Filters are used in applications such as fluorescence microscopy, clinical chemistry, spectroscopy, or machine vision inspection. Optical Filters are ideal for life science, imaging, industrial, or defense industries. Custom filters are available for both large manufacturing needs and in prototype volumes. Contact us for more information to arrange a quote. Cut Off filters  - Dichroic Filter - Longpass Edge Filters   ( Long pass Filters) - Shortpass Edge Filters   ( short pass Filters) - IR Cut Filters   ( IR-CUT Filter) - UV-IR Cut Off Filters   Longpass Filters transmit wavelengths greater than the cut-on wavelength, while Shortpass Filters transmit wave-  lengths shorter than the cut-off wavelength. Dichroic filters perform the same function, while guaranteeing that the  rejected wavelengths are reflected. Any of these filters can be designed for 0  or 45  angle of incidence. Edge and Di- chroic Filters are commonly used in Fluorescence instrumentation, Heat Rejection Applications, and as Color Filters.  While somewhat angle sensitive, they are more forgiving than bandpass interference filters.    UV IR Cut is a specialized filters that has the ability to cut both UV rays below 400nm and IR rays above 680mn leaving just the light rays in the visible spectrum passing through the filter and into the camera.This filter is used on a digital camera and the video    350-405nm:Tavg<10% 415±10nm:T=50% 430-630nm:T>85%, Tavg>90% 650±10nm:T=50% 700-1100nm:T<3%   

IR Cut off Filters   Worldhawk can providea precision filters for many applications, including bandpass interference filter, Cut off filters, UV bandpass filter, Narrow bandpass filter, ND filter, Negative Filter or Notch filters, dichroic, color substrate. Optical Filters are used to selectively transmit or reject a wavelength or range of wavelengths. Optical Filters are used in applications such as fluorescence microscopy, clinical chemistry, spectroscopy, or machine vision inspection. Optical Filters are ideal for life science, imaging, industrial, or defense industries. Custom filters are available for both large manufacturing needs and in prototype volumes. Contact us for more information or to arrange a quote. Cut Off filters  - Dichroic Filter - Longpass Edge Filters   ( Long pass Filters) - Shortpass Edge Filters   ( short pass Filters) - IR Cut Filters   ( IR-CUT Filter) - UV-IR Cut Off Filters   Longpass Filters transmit wavelengths greater than the cut-on wavelength, while Shortpass Filters transmit wave-  lengths shorter than the cut-off wavelength. Dichroic filters perform the same function, while guaranteeing that the  rejected wavelengths are reflected. Any of these filters can be designed for 0  or 45  angle of incidence. Edge and Di- chroic Filters are commonly used in Fluorescence instrumentation, Heat Rejection Applications, and as Color Filters.  While somewhat angle sensitive, they are more forgiving than bandpass interference filters.    UV IR Cut is a specialized filters that has the ability to cut both UV rays below 400nm and IR rays above 680mn leaving just the light rays in the visible spectrum passing through the filter and into the camera.This filter is used on a digital camera and the video  350-405nm:Tavg<10% 415±10nm:T=50% 430-630nm:T>85%, Tavg>90% 650±10nm:T=50% 700-1100nm:T<3%   

Bandpass Filter Worldhawk can provide precision filters for many applications, including optical bandpass filter, Cut off filters, UV bandpass filter, Narrow bandpass filter, ND filter, Negative Filter or Notch filters, dichroic, color substrate. Optical Filters are used to selectively transmit or reject a wavelength or range of wavelengths. Optical Filters are used in applications such as fluorescence microscopy, clinical chemistry, spectroscopy, or machine vision inspection. Optical Filters are ideal for life science, imaging, industrial, or defense industries. Custom filters are available for both large manufacturing needs and in prototype volumes. Contact us for more information or to arrange a quote.   Bandpass fIlters - Bandpass filters - Narrow bandpass filter - UV bandpass filter - IR Bandpass filter Technique Data:  FWHM: 30nm-80nm OD:2-3 FWHM: 5nm-25nm OD:4-6 Size: φ6-φ200 Center Wavelength Range:340-1064nm (340 380 405 450 492 510 546 578 600 620 630 808 850 940 1064...)

Aspherical lens Aspherical lens is a single optical component with one or two aspheric surfaces. An aspheric lens or asphere is a lens whose surface profiles are not portions of a sphere or cylinder. As optical systems are pushed to be better, faster, and cheaper, it becomes necessary to explore aspheric solutions. Aspherical elements eliminate monochromatic aberrations (e.g. spherical aberration) and improve focusing and collimating accuracy. The whole system will be smaller and lighter, and possibly cheaper than the multi-lens design.    Our aspheric lenses are made by grinding & polishing. So they are more precise than traditional mould pressed. And also the tooling cost for grinding & polishign would be cheap and small quantity order would be accept.   We can offer Precision Polished Aspheric Lenses Aspheric Condenser Lenses Aspheric Cylindrical lenses ect.   Specifacation of Aspherical Lens   Size range The focal length range Wavelength range High precision aspheric lens 10-50mm 7.5-50mm 0.4-1.6 UV fused quartz aspheric lens 10-50mm 8-60mm 0.2-2.2 Best form aspherical lens 25mm 25-100mm 0.532-1.064 Achromatic aspheric lens 9-25mm 12-50mm 0.4-0.7 Plastic aspheric lens 10-25.4mm 6.35-254mm 0.4-1.2 Small diameter aspheric lens 1.8-9.9mm 0.7-22mm 0.4-1.6 Small diameter infrared aspheric lens 3.5-6.5mm 1.5-4mm 2-14 Zinc selenide aspheric lens 25.4-50.8mm 12.7-50.8mm 0.6-16 Silicon aspheric lens 25-50mm 25-50mm 1.2-7 IG6 aspheric lens 25-50mm 12.5-50mm 0.9-13 Germanium aspheric lens 25mm 12.5-100mm 2-16 Aspheric cylindrical lens 25mm 20-50mm 0.4-1.6

Projector Meniscus Lens Two refracting surfaces of optical lens are both spherical or one is spherical and the other is flat.  Worldhawk can supply standard and high-precision spherical lens in a variety of shapes, sizes, focal lengths on a wide spectrum. The structure of lens can be Plano-convex, Plano-concave, Bi-convex, Bi-concave, Meniscus. They are widely used in medical, industry, spaceflight andmilitary etc.. Convex Lenses are ideal for light collimation or for focusing applications utilizing monochromatic illumination, in a range of industries including industrial, pharmaceutical, robotics, or defense. Concave Lenses are optical lenses with a negative focal length.  Concave Lenses are ideal for beam expansion, light projection, or for expanding an optical system’s focal length. Specification of Projector Meniscus Lens Materail Optical glass, Fused Silica, Optical crystal.  Diameter Tolerance +/-0.1mm, +/-0.05mm Center Thickness Tolerance +/-3', +/-1', +/-30''  Focal Length Tolerance Upon costomer requirement.  Clear Aperture >90% Surface Quality(S/D) 60/40,40/20 or better Chamfer 0.1~0.3mm x 45degree Coating R/AR