Products / Services : West Coast Tech Limited

Right angle prism The right-angle prisms are often preferable to an inclined mirror in applications involving severe acoustic or inertial loads. This is because a right-angle prism is easier to mount and deforms much less than a mirror in response to external mechanical stress. Very high transmission can be achieved by using the hypotenuse face in total internal reflection, and by antireflective coating the entrance and exit faces. Alternatively, the hypotenuse face can be used in external reflection, and coated with a metallic reflective coating. Specifications Material: BK7, fused silica Dimension tolerance: ¡À0.2mm Angle tolerance: 5 arc seconds / 1 arc minute / 3 arc minutes Flatness: ¦Ë/2 @632.8nm Surface quality: 60-40 Bevel: 0.2mm x 45 deg

VUV Plano concave cylindrical mirror Specifications Material: BK7, Grade A fine annealed Dimension Tolerance: +/- 0.10mm Radius: +/- 1% Surface roughness RMS (nm) < 1.00 nm Optical face: super finished Coating: Al + protection layer (MgF2) transparent to UV Reflectivity: R > 50% @ 120 - 200nm, R > 70% @ 200 - 850nm Angle of incidence 45¡ã

Sapphire prism Sapphire has the characteristic of high hardness, thermo stability, excellent thermal conductivity, infrared transmitting, anti-chemical corrosion, good chemical stability, thermal performance, perfect electrical specification and dielectric property. It is widely applied to infrared photoelectric and medical equipments. Specifications Crystal Orientation: C, A, M optional Orientation deviation: < 2o Dimension tolerance: ¡À 0.10mm Surface Quality: 40 ¨C 20 Surface accuracy N: 2 lambda Irregularity ¡÷N: Lamda/4

VUV mirror Specifications Material: BK7, Grade A fine annealed Diameter Tolerance: +0 /- 0.10mm Thickness Tolerance: +/- 0.10mm Surface flatness: Lambda/4 Surface quality: 60 - 40 scratch and dig Coating: Aluminized with MgF2 protection layer Reflectivity: R > 50% @ 120 - 200nm, R > 70% @ 200 - 850nm Angle of incidence 45¡ã

Micro Lens Specifications Material: optical glass, fused silica Diameter: 0.5 ¨C 5mm Dimension tolerance: ¡À 0.02mm Surface quality: 40/20 ¨C 80/50 Scratch and dig Surface accuracy: ¦Ë/2 ¨C 2¦Ë @ 632.8nm Centration: 3 arc minutes Protective Bevel: allowed up to 0.1mm AR Coating: Upon request

Ultra smooth surface window Ultra smooth surface has a roughness less than 1nm. We can achieve a roughness of 0.1nm with the substrate of fused silica, silicon, etc. Key features: - Low loss - low scatter Applications: - Soft X ray optical system - Mirrors for ring laser gyroscope (RLG) - High density wavelength division multiplexer - High energy laser mirror - Functional photoelectric device - Optical window - Polishing Magnetic Head

Penta prism Penta prism has two important properties. The first is that as the image is deviated by 90 degrees it is neither inverted nor reversed. The second is that the penta-prism is a constant deviation prism, meaning that the same exact 90-degree deviation angle applies to all rays transmitted by the useful aperture regardless of the angles between these rays and the optical axis. The deviation is thus independent of the prism orientation, making the penta-prism especially important in application in which prism orientation can¡¯t be precisely controlled. This prism is commonly used in optical tooling, alignment, range finding, surveying, and other instrumental applications. Specifications Material: CDGM H-K9L, grade A fine annealed Dimension tolerance: ¡À0.2mm 90¡ã angle deviation: Better than 5 arc seconds Flatness: ¦Ë/2 @632.8nm Surface quality: 60-40 Reflectivity: R > 95% per surface @ 630 - 680nm

Micro Right Angle Prism Specifications Material: H-K9L, lead free optical glass, N-BK7 equivalent Prism Type: Right angle: 45¡ã-90¡ã-45¡ã Angular Tolerance: ¡À3 arc minutes Dimensional Tolerance: +0.0/-0.2mm Surface Quality: 40-20 S/D Clear Aperture: > 80% Flatness: ¦Ë/2 @ 632.8nm Corner Chips: none allowed Protective Bevel: allowed up to 0.1mm AR Coating: AR coating on both legs for R<0.25% at 532nm

Spherical lens We manufacture a series of spherical lens, including plano convex lens, plano concave lens, bi-convex lens, bi-concave lens, meniscus lens and achromatic lens. Material: Optical glass, fused silica ¡­ Dimension: 1 - 500mm Dimension tolerance: + / - 0.02mm Surface quality: Up to 10-5 Surface accuracy: Up to ¦Ë/10 Centration: 3 arc minutes Clear aperture: > 90% Coating:¡¡ According to the requirement

Corner Cube Prism It has three mutually perpendicular surfaces and a hypotenuse face, light entering through the hypotenuse is reflected by each of the three surfaces in turn and will emerge though the hypotenuse face parallel to the entering beam regardless of the orientation the incident beam, it is often used to the distance measurement, optical signal process and laser interferometer. Application: - geodetic measurement instrument - precision measurement in laboratory - Astronautics and Aviation Specifications Material: N-BK7 / H-K9L, fused silica, Silicon, Germanium Diameter: Dia 8 ¨C 180 mm Dimension tolerance: +/- 0.10mm Surface roughness: 0.01 Surface quality: Up to 20-10 scratch and dig Surface accuracy: Up to lambda/20 Angle tolerance: Up to 1 arc second Coating: With or without AR coating

Metalized Sapphire Window Metalized sapphire windows are created by applying thin layers of chrome, nickel and gold around the edge of a sapphire window. This metalized edge creates a surface that can be soldered or bonded directly into your opto-mechanical assembly allowing you to create a hermetic seal. Hermetically sealed optics is used in a variety of applications ranging from infrared imaging systems to medical devices. Specifications Material: optical sapphire (Al2O3) Diameter tolerance: +0, -0.1mm Thickness tolerance: +/-0.05mm Clear aperture: 90% Surface quality: 80-50 scratches and digs Surface accuracy: 2 lambdas per 25.4mm @ 632.8nm Parallelism: < 3 minutes Coating: AR coating, T > 98% @ 1260-1600nm Metalizing: Chrome, Nickel, and Gold; sputtering method or screen printing method

Achromatic Cylindrical Lens Achromatic Cylindrical Lenses are similar in design and function to a standard cylinder lens, but have the added benefit of reducing the spherical and chromatic aberration at the image plane. When used with a monochromatic light source (such as a laser diode), the achromatic cylinder lens will create a 50 ¨C 90% smaller spot, depending on the numerical aperture of the lens. When used with a broadband light source, the lens will minimize chromatic aberration, yielding focused lines with less color separation, or will produce brilliant anamorphic images. Positive cylindrical lenses are ideal for applications requiring magnification in only one dimension. While spherical lenses focus an incident ray symmetrically, cylindrical lenses act in the same manner but in only one dimension. Typical applications include line generation with laser diodes, focusing a diverging beam onto a linear detector array or using a pair of cylindrical lenses to collimate and circularize the output of a laser diode. An achromatic cylindrical lens is a type of doublet lens consisting of a positive low-index (crown) element and a negative high-index (flint) element cemented together. The two materials are designed to work together to reduce spherical and chromatic aberrations. The additional design freedom provided by using a doublet design allows for further optimization of performance. Therefore, an achromatic lens will have noticeable advantages over a comparable diameter and focal length singlet lens.

Aspherical Lens We provide aspherical lens for off-axis parabolic, ellipsoid and hyperboloid. Specifications Material: Optical glass, fused silica, Si, Ge ¡­ Design wavelength: Visible, IR Focal length Tolerance: +/- 1% Surface quality: 60/40 Surface Accuracy: ¦Ë /2 Centration: 3 minutes Clear aperture: > 90% Coating: Available upon request

SAC lens The Slow-Axis-Collimation lens is a highly efficient means of forming the beam in the slow axis of diode lasers. It is available as a single lens. All of our optics is produced using high-quality optical glass. The exacting product tolerances guarantee efficient collimation of the light from all emitters and compatibility with laser bars and stacks. Key features: • High beam quality • Efficient collimation • Transmission in excess of 99% • High precision and uniformity • Long-term stability • Optimized lens design Material Size EFL NA WD Coating S-TIH53 2 x 3 x 2mm 3.34mm AR coating @ 808nm

Front Surface Mirror Specifications: Material: glass Dimension tolerance: +/-0.2mm Surface quality: better than 80-50 scratch and dig Coating: Aluminum coating with protective layer on outer surface Key feature: 1. Full 360 deg horizontal field of view 2. Precision glass reflector - front surface aluminum optical coating - SiO protective coating for enhanced durability 3. Aspherical mirror 4. strong package from damage Application: photography We manufacture front surface mirrors with different diameter. Samples for testing purpose are available upon request.

Cylindrical lens Cylindrical lenses are either Plano-convex or Plano-concave in form and rectangular in shape. These lenses are used in applications requiring magnification only, such as in transforming a point image into a line image or changing the height of an image without changing its width or vice versa. Therefore serves a variety application, such as slit line detector array illumination, bar code scanning, holography, optical information processing and computer, laser projection. Specifications Material: Optical glass, fused silica ¡­ Dimension: 1 - 500mm Dimension tolerance: + / - 0.02mm Surface quality: Up to 10-5 Surface accuracy: Up to ¦Ë/5 Centration: 3 arc minutes Clear aperture: > 90% Coating:¡¡ According to the requirement

Part No.£ºIRL-10A Description£º 10.5mm high precision Ge lens A Focal length£º 10.5mm FOV£º 42¡ã*32¡ã IFOV£º 2.45mrad Applicable detector£º 320*240 focal plane assembly, Vanadium Oxide (VOx) un-cooled micro calorimetric detector with 25¦Ìm intervening space Spectrum range: 8 ¦Ìm - 14 ¦Ìm Min focal length£º 0.3 m F/#£º 0.8 Part No.£ºIRL-10B Description£º 10.5mm high precision Ge lens B Focal length£º 10.5mm FOV£º 42¡ã*32¡ã IFOV£º 4.9mrad Applicable detector£º 160 x 120 focal plane assembly, Vanadium Oxide (VOx) un-cooled micro calorimetric detector Spectrum range: 8 ¦Ìm - 14 ¦Ìm Min focal length£º 0.3 m F/#£º 0.8 Part No.£ºIRL-10C Description£º 10mm high precision Ge lens C Focal length£º 10mm FOV£º 46¡ã*34¡ã IFOV£º 2.50mrad Applicable detector£º 320 *240 focal plane assembly, un-cooled micro calorimetric detector Spectrum range£º 7.5 ¦Ìm - 14 ¦Ìm Min focal length£º 7.5 cm£¨around 3 inches£© F/#£º 0.8 Part No.£ºIRL-20A Description£º 20mm high precision Ge lens A Focal length£º 20mm FOV£º 23¡ã*17¡ã IFOV£º 1.30mrad Applicable detector£º 320*240 focal plane assembly, Vanadium Oxide (VOx) un- cooled micro calorimetric detector with 25¦Ìm intervening space Spectrum range£º 8 ¦Ìm - 14 ¦Ìm Min focal length£º 0.15 m F/#£º 0.8 Part No.£ºIRL-20B Description£º 20mm high precision Ge lens B Focal length£º 20mm FOV£º 23¡ã*17¡ã IFOV£º 2.6mrad Applicable detector£º 160 x 120 focal plane assembly, Vanadium Oxide (VOx) un-cooled micro calorimetric detector Spectrum range£º 8 ¦Ìm - 14 ¦Ìm Min focal length£º 0.15 m F/#£º 0.8 Part No.£ºIRL-20C Description£º 20mm high precision Ge lens C Focal length£º 20mm FOV£º 23¡ã*17¡ã IFOV£º 1.25mrad Applicable detector£º 320 x 240 focal plane assembly, un-cooled micro calorimetric detector Spectrum range£º 7.5 ¦Ìm - 14 ¦Ìm Min focal length£º 15 cm£¨around 6 inches£© F/#£º 0.8 Part No.£ºIRL-54A Description£º 54mm high precision Ge lens A Focal length£º 54mm FOV£º 9¡ã*6¡ã IFOV£º 0.47mrad Applicable detector£º 320*240 focal plane assembly, Vanadium Oxide (VOx) un-cooled micro calorimetric detector with 25¦Ìm intervening space Spectrum range£º 8 ¦Ìm - 14 ¦Ìm Min Focal length£º 0.6 m F/#£º 0.8 Part No.£ºIRL-54B Description£º 54mm high precision Ge lens B Focal length£º 54mm FOV£º 9¡ã*6¡ã IFOV£º 0.94mrad Applicable detector£º 160 x 120 focal plane assembly, Vanadium Oxide (VOx) un-cooled micro calorimetric detector Spectrum range£º 8 ¦Ìm - 14 ¦Ìm Min focal length£º 0.6 m F/#£º 0.8 Part No.£ºIRL-40C Description£º 40mm high precision Ge lens C Focal length£º 40mm FOV£º 11.5¡ã*8.7¡ã IFOV£º 0.63mrad Applicable detector£º 320 x 240 focal plane assembly, un-cooled micro calorimetric detector Spectrum range£º 7.5 ¦Ìm - 14 ¦Ìm Min focal length£º 45 cm£¨around 18 inches£© F/#£º 0.8

Metalized Ge Window Metalized Ge window is applied in the packaging of infrared focal plane imaging detector. Specifications Material: Optical grade Ge, monocrystalline Dimension tolerance: +/- 0.1mm Parallelism: 3 are minutes Surface quality: 60-40 Surface accuracy: 3 fringes Coating Optical coating: T > 90% @ 8um-12um£¬T < 1% @ 1-7um Metalizing coating: Within 2mm from the edge, metalizing coating (Ti/Ni/Au or Cr/Ni/Au)

MgF2 window Magnesium Fluoride (MgF2) Windows offer excellent broadband transmission from the deep-UV to the mid-infrared. DUV transmission makes them ideal for use at the Hydrogen Lyman-alpha line and for UV radiation sources and receivers, as well as excimer laser applications. MgF2 is a rugged material resistant to chemical etching, laser damage, and mechanical and thermal shock. It has a Knoop Hardness of 415 and index of refraction of 1.38. Key features: • Excellent Transmission from 120nm to 7¦Ìm • Rugged and Durable • Resistant to Chemical Etching Specifications Material: MgF2 single crystal Optical Axis Orientation: A-cut ( <100>-cut ) +/- 0.5¡ã Diameter tolerance: + 0 / -0.10 mm Thickness tolerance: + / - 0.10 mm Clear aperture: 90% of the diameter Surface quality: 20-10 scratch and dig Surface accuracy: ¦Ë/4 @ 632.8 nm Perpendicularity: < 10 arc min Parallelism: 15 arc seconds

Sapphire lens Sapphire has the characteristic of high hardness with Mohs hardness 9. With high transmittance, excellent mechanical strength and heat resistance, it can take aerodynamic velocity pressure and heat load, thus is widely used as ultraviolet, visible and infrared windows; also it can be used as the luxury watch cover. Specifications Orientation: C, A, M optional Orientation deviation: < 2o Diameter: ¦µ5 - ¦µ250mm Diameter tolerance: +0 /- 0.02mm Radius of curvature: R10 - ¡Þ mm Centration: ¡Ü 2¡ä Surface Quality: 40 ¨C 20 Surface accuracy N: ¡Ü 2 Irregularity ¡÷N: ¡Ü 0.5

Dome Domes can be used in pods and missiles. They are designed to protect electronic detectors and sensors from moving particles, water and corrosives. The optical domes provide front surface protection for detectors and sensors against moving particles such as sand, debris, and water while extending their viewing angles. They can be manufactured to specification from a variety of materials. Material used: Fused silica, Si, Ge, GaAs, ZnS, ZnSe, Sapphire, MgF2, Spinel, IR glass, etc. Radius: R10 ¡Þ Diameter: ¦µ10 ¦µ400mm Diameter tol: ¡À 0.04 ¡« ¡À 0.2mm Thickness tol: ¡À 0.02mm ¡À 0.15mm Surface quality: 40/20 80/60 Surface accuracy: ¦Ë/2 4¦Ë Irregularity: 0.1 1.0 Centration: 30 arc seconds ¨C 5 arc minutes Coating: HEBBAR coating, diamond like coating, filter coating, beamsplitter coating, protective coating, etc. Transmission: > 95% Reflectivity: < 3% max

Sapphire window Sapphire Windows are manufactured from single crystal sapphire, making them ideal for demanding applications (such as laser systems) because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Sapphire is the second hardest crystal next to diamonds and, because of their structural strength, sapphire windows can be made much thinner than other common dielectric windows with improved transmittance. Chemically, sapphire is single crystal aluminum oxide (Al2O3) and is useful in a transmission range from 0.15 - 5.5¦Ìm. Key features: • Extreme Surface Hardness Chemical Resistance • Transmits Wavelengths Ranging From UV to Mid-Infrared • Thinner and Stronger than Standard Glass Windows • Big size available Technical capability Material: Optical grade sapphire (Al2O3) Orientation: According to requirement Diameter: 2 - 300mm Diameter tolerance: +0/-0.1mm Thickness: 0.5 ¨C 50mm Thickness Tolerance: ¡À 0.05mm Clear aperture: 90% of the diameter Surface quality: 40-20 Surface accuracy: ¦Ë/2 Parallelism: < 3 minutes

Sapphire dome Sapphire has the characteristic of high hardness, high strength, high transmittance, and high resistance to thermal shock quality factor. With excellent performance on thermal shock resistance and abrasion resistance, it can be widely applied to high speed working photoelectric equipment and intelligent high speed dome camera in airborne, shipboard, space-borne, submarine-based, land-based field. Specifications Crystal orientation: C, A, M optional Diameter: ¦µ20 ¨C ¦µ300 mm Radius of curvature: R10 - R150 Wall thickness: > 1mm Edge thickness difference: ¡Ü 0.02mm Total thickness variation: ¡Ü 0.05mm C axis deviation: ¡Ü 2o Centration: ¡Ü 2 arc minutes Surface Quality£º Better than 60-40 Power N: ¡Ü 5 fringes Irregularity ¡÷N: ¡Ü 1 fringe