Photonchina s windows are used to isolate different physical environments while allowing light to pass. When selecting windows you should consider materials, transmission, scattering, wavefront distortion, parallelism and resistance to certain environments. We offer a wide range of different materials and different degree of precision windows. Special materials are available upon requirement. A broad range of single layer or multilayer antireflective coatings on optical windows are available. N-BK7 Optical Windows N-BK7,or H-K9L Chinese equivalent, is an excellent optical glass material for most visible and near infrared applications. It is the most common borosilicate crown optical glass, and it provides great performance at a good value. Its high homogeneity, low bubble and inclusion content, and straightforward manufacturability make it a good choice for transmissive optics. UV Fused Silica Optical Windows UV Fused Silica Windows feature low distortion, excellent parallelism, low bulk scattering and fine surface quality. This makes them perfectly suited for a wide variety of demanding applications, including multiphoton imaging systems and intracavity laser applications. Calcium Fluoride Optical Windows Calcium Fluoride optical windows are transparent from 180 nm to 8 �±�²�³�´�µm, making them ideal for applications such as spectroscopy or fluorescence imaging in the UV, visible, and IR wavelengths. Sapphire Optical Windows Uncoated Sapphire windows are ideal for harsh conditions, including environments subject to high temperatures, high pressures, strong vacuum, or corrosive atmospheres. Sapphire has high compressive strength and is resistant to attack from strong acid. Wedged Windows Photonchina high-energy laser wedge windows are specially designed to eliminate losses in vacuum cell applications and can be used as vacuum windows, convection barriers, or interferometer compensator plates. Brewster Windows When oriented at Brewster's angle (55.57�¬), s-polarized light is partially reflected, p-polarized light is transmitted without loss. When placed inside a laser cavity Brewster windows cause p-polarized light to have higher effective gain, resulting in the laser's final output being strongly p-polarized. Photonchina Brewster windows are made of UV grade fused silica with laser grade surface quality and parallelism, making them ideal polarizers for use inside a laser cavity. PHOTONCHINA WEDGE WINDOWS CAPABILITY ATTRIBUTE PREMIUM MATERIAL UV grade Fused Silica DIAMETER TOLERANCE +0.0, -0.1mm WEDGE 30 15 arc min CLEAR APERTURE >90% PARALLELISM
Rochon Polarizers Rochon polarizer is made of two birefringent material prisms cemented or optically contacted together. The Rochon prism was invented by and is named after Abb Alexis Marie Rochon. It is in many ways similar to the Wollaston prism, but the ordinary ray passes through the prism undeviated. Any separation angle can be designed according to request of customers. Features Multiple Polarization Materials Available Ordinary Rays Pass Through Undeviated Extraordinary Rays Deviate Photonchina Specifications Material: a-BBO, Calcite, YVO4,Quartz,MgF2 Wavelength Range: a-BBO 190-3500nm,YVO4 500-4000nm Quartz 200-2300nm Calcite:350-2300nm Extinction Ratio: Quartz
High Transmission Polarizer High Transmission Glan Laser Polarizers is a special type of Glan Laser Polarizers. Its incidence angle is brewster angle cut which can greatly improve the transmission ray up to 98% in a wide range of wavelength without coating. The polarizer can be made from Calcite or YVO4 crystals. In order to get transmission of a wide range of wavelength, the polarizers are not recommended to use for large acceptance angle. It is typically used at the angle within+/-5. Photonchina Specifications Material: Calcite or YVO 4 Wavelength Range: Calcite:350 2300 nm, YVO4:500 4000 nm Extinction Ratio: Calcite:
Glan Taylor polarizer is made of two birefringent prisms that are assembled with an air space. The polarizer with no side escape windows is suitable for low to medium power application where the side rejected beams are not required. Photonchina Featureï¼? Air-spaced Close to Brewster's Angle Cutting High Polarization Purity Short Length Wide Wavelength Range Suitable for low to medium power application 1. Calcite Glan Taylor Polarizer C.A. fa(mm) O.D. fd(mm) L �¯0.1(mm) 6.0 15.0 15.0 8.0 25.4 17.0 10.0 25.4 19.0 15.0 30.0 23.0 20.0 38.0 29.0 2. a-BBO Glan Taylor Polarizer C.A. fa(mm) O.D. fd(mm) L�¯0.1(mm) 6.0 15.0 15.0 8.0 25.4 17.0 10.0 25.4 19.0 15.0 30.0 23.0 20.0 38.0 29.0 3. YVO4 Glan Taylor Polarizer C.A. fa(mm) O.D. fd(mm) L 0.1(mm) 6.0 15.0 12.0 8.0 25.4 15.0 10.0 25.4 17.0 15.0 30.0 20.0 20.0 38.0 25.0
Glan Laser polarizer is made of two same birefringent material prisms that are assembled with an air space. Photonchinas polarizer is a modification of the Glan Taylor type and is designed to have less reflection loss at the prism junction. The polarizer with two escape windows allow the rejected beam to escape out of the polarizer, which makes it more desirable for high energy lasers. The surface quality of these faces is relatively poor as compared to that of entrance and exit faces. No scratch dig surface quality specifications are assigned to these faces. Photonchina Feature Air-spaced Close to Brewster's Angle Cutting High Polarization Purity Short Length Wide Wavelength Range Suitable for medium power application Specifications Material: a-BBO, Calcite or YVO 4 Wavelength Range: BBO:200 3500 nm, Calcite:350 2300 nm, YVO4:500 4000 nm Extinction Ratio: Calcite:
Micro Spherical Lenses Under the condition of high refractive index, some optical components can achieve short focal length. Therefore, the micro lens becomes an ideal choice in the field of high precision applications. Through years of accumulated processing know-how technologies and production capacity, high standard thin film coating performance and strict testing requirements, Photonchina provides customers with one of the world's smallest but excellent micro lenses products, which have been widely used in various medical devices (endoscope lens, for example), precision surveying and optical communications instruments. From design, manufacturing to optical coating, from endoscope lens, capsule lens to special-required rod lens, from single mini lens to glued lenses system, engineers in Photonchina implement strict production process to ensure stable quality, competitive price as well as responsive lead time. A variety of optical glass or other materials, such as BK7, N-SF11, H-LAF76, Fused Silica and so on are available for customers design. H-LaF53, for instance, has often been used in endoscope lens or capsule lens production. We have a wide range of lenses in shape: convex, concave, biconvex, meniscus etc. Material : N-SF11H-LaF53H-LaF76 Fused Silicon etc. Radius of Curvaturemm R0.25R Diametermm 0.5 5 Tolerancemm 0.005 0.05 Lengthmm L0.5 L30 Tolerancemm 0.020.06 Thickness tolerancemm 0.01 0.1 Surface Quality 10/580/50 Flaness /20/4 Off centering 110 Optical coating : Upon request
Photonchina produces the smallest rod lenses for customers at home and abroad. Micro rod lenses: 0.5-1.8mm diameter, 1.0-25mm length, with one end of designated curvature radius and another end of arbitrary angle. Both ends of arbitrary radii or angle are also available. Highly customized products for a wide range of applications from medical device, fiber communications, optical display and surveying equipment. What is more, we can provide unique rod-shaped glued lenses by combining special gluing/cementing technics and edging skill. These glued/cemented rod lenses subassembly can be made of up to four single micro rod lenses with various combination. Rod lens assembly systems are able to provide images with greater brightness, contrast and color reproduction than conventional lenses. Rigid endoscope, for instance, which usually has a series of high-resolution optical glass rod lenses, can be forward viewing (0 degrees) or angled (10120 degrees) to allow visualization out of the axis of the telescope and increase the FOV by rotating the instrument. The optical quality of lens-generated images of rigid endoscopes still surpasses that of the fiber-optic or digital images produced by flexible scopes. High performance optical coatings for rod lenses are provided. Optical glass material NBK7, N-SF11 from Schott, Corning 7980 etc, are all available. Material : N-SF11H-LaF53H-LaF76 Fused Silicon etc. Radius of Curvaturemm R0.25R Diametermm 0.5 5 Tolerancemm 0.005 0.05 Lengthmm L0.5 L30 Tolerancemm 0.020.06 Thickness tolerancemm 0.01 0.1 Surface Quality 10/580/50 Flaness /20/4 Off centering 110 Optical coating : Upon request
Zero Order Waveplate The zero order waveplate is designed to give a retardance of zero full waves, plus the desired fraction. Zero order waveplate shows better performance than low/multiple order waveplates. It has broad bandwidth and a lower sensitivity to temperature and wavelength changes. It should be considered for more critical applications. It is constructed of two low order waveplates with their axes crossed. Thus,the effect of the first plate is canceled by the second,except for the residual difference between them. There are normally three different structures as follows, Optical Contact Cemented by Epoxy Air spaced Low Order Waveplate Low(multiple) order waveplate is designed to give a retardance of several full waves, plus the desired fraction. This result in a single, physically robust component with desired performance. However, even small changed in wavelength or temperature will result in significant changes in the desired fractional retardance. They are less expensive and find use in many applicatios where the increased sensitivities are not an important. Photonchinas waveplates fabrication starts from quartz materials cutting with their axes oriented within a few arcminutes before being polished to a laser-quality finish, arcsecond parallelism, and
Photonchinas beamsplitters are used to split or combine beams of light. Plates are used for most laser applications as they exhibit low absorption. Cubes are a convenient, protected form for low power applications. The performance of a beamsplitter is mainly dependent on the coating specifications. Non-polarizing beamsplitter (high power NPBS) is a kind of special polarizing beamsplitter. It makes the p-polarization component and S- polarization component of incident light have similar spectral characteristics.
Photonchinas wollaston polarizer can separate an incident beam into two rays: extraordinary and ordinary ray with a deviation angle which is dependent on wavelength. Both rays are transmitted through the other surface. Specifications: Material: a-BBO, Calcite ,YVO4,Quartz Wavelength Range: a-BBO:190-3500 nm, Calcite:350-2300 nm, YVO4:400-5000 nm,Quartz:200-2300 nm Extinction Ratio: Calcite,Quartz:
Achromatic lenses are normally made of BK7, fused silica and CaF2. Special focusing systems can be designed by Photonchinaâ??s engineer team. Sizes from smallest diameter of 3mm to biggest of over 100mm are all available. Normal Achromatic Lens Super Small Achromatic Lens Super small Achromatic Lenses for your specific application provide excellent wavefront quality, super small spot size and improved modulation transfer function (MTF). Feature Small diameter size up to 3mm Short focal length, such as 5mm Strict quality control, excellent quality AR-coating, mounts services
Micro Lens (Ultra small lens) Because of the ultra-small size of this kind of lens (outer diameter 0.5mm-5mm, length: 1mm-20mm), micro lens or ultra-small lens often requires special processing technology, unique production know-how and special optical fixture, etc. Photonchina provides various sizes of micro lens with an array of applications including active devices, wavelength division multiplexer ( WDM) and fiber lasers (see C-lens, G-lens) in fiber communications, endoscopy for medical and industrial use, capsule endoscope, etc. Its new application fields are still expanding. A variety of optical glass or other materials, such as N-SF11, H-LAF76, Fused Silica and so on are available for customerâ??s design. H-LaF53, for instance, has often been used in endoscope lens or capsule lens production. The outer diameter of micro lens covers 0.5mm to 5.0mm with any radius of curvature that can be made. We have a wide range of lenses in shape: convex, concave, biconvex, meniscus etc. Photonchina can provide unique rod-shaped glued lens by combining special gluing technics and edging skill. This rod lens has excellent eccentricity and clear aperture index. From design, manufacturing to optical coating, from endoscope lens, capsule lens to special-required rod lens, engineers in Photonchina implement strict production process to ensure stable quality, good yield, competitive price as well as responsive lead time.
Achromatic Waveplate Achromatic waveplate is made from two different substrate materials such as crystal quartz and magnesium fluoride. For the single material,waveplateâ??s working wavelength is very limited because of the dispersion of the material. But Achromatic Waveplate uses two different kinds of materials,with the different dispersion, such waveplate is not sensitive to the wavelength change. Dual Wavelength Waveplate Dual wavelength waveplate is a special type of multiple waveplate that provides a specific retardance at two different wavelengths, itâ??s particularly useful when used in conjunction with other polarization sensitive components to separate coaxial laser beams of different wavelength. It is widely used to improve conversion efficiency in solid double frequency laser device. Polarization Rotator Due to the rotation activity of natural quartz crystal, it also can be used as polarization rotators so that the plane of input linearly polarized beam will be rotated at special angle which is determined by the thickness of quartz crystal.
Wavepalte Types: Photonchinas waveplates include octadic waveplate (1/8 waveplate),quarter waveplates(1/4 waveplate), half wave plates(1/2 waveplate) and full waveplate Both circular aperture and quadratic aperture are available. Photonchinaâ??s waveplate can transmit light and modify its polarization state without attenuating, deviating, or displacing the beam.It is ideal for applications requiring high damage thresholds and retardation stability over temperature change, such as for use with lasers or infrared light sources.
Glass lenses, cover window, optical filter, glass prisms, lens, optics.
Prism, lens, infrared optics, UVFS optics, windows, filters.
Product list Lenses Optical prisms Optical filters Optical filters Optical mirrors Optical windows Optical components We can produce as customers' request, like plano-concave lens, plano-convex lens, double-concave lens, meniscus lens, achromatic lens, triplet lens and rod lens. The used materials include bk7, sf11, uv-fused silica, and caf2, etc. Example. Specifications: Materials:bk7, fused silica, ge, si, caf2... Diameter:1.5300mm Diameter tolerance:+/-0.02 mm Thickness tolerance:0+/-0.02mm Centring error
Specification: Materials:Colored glass Diameter Tolerance: +0.0/-0.20 Thickness Tolerance:+/-0.15 mm Parallelism
Specifications: Materials:optical glass, white glass, quartz, silicon Surface Quality:20-10 Surface Figure:λ/10@633nm Clear Aperture:Central 90 of diameter Bevel:0.25mm x 45° Design Wavelength:480, 546.1, 643.8nm Diameter Tolerance:-0.00/-0.15mm Thickness Tolerance:+/-0.1 mm Centring Erro
BK7 window is the most common type of window. It has good performance over visible and near infrared wavelength region. At the same time,BK7 window is ideal for applications require minimal transmitted beam deviation. It is suitable for coating AR film. Specifications: Materials:BK7 Diameter Tolerance +0.0,/-0.15 mm Thickness Tolerance +/-0.1mm Parallelism
