Optical Components Windows & Filters Windows & Filters Wind ows Fil ters CURVED WINDOWS ● Made from BK7 glass or UV grade fused silica ● Polished to high surface quality ● Standard substrates are available with a variety of radii of concave curvature We provide a wide selection of shapes and sizes, with plano, spherical or cylindrical surfaces. Thickness Tolerance Curved Surface Radius Tolerance Diameter Tolerance We offer two substrate materials spanning a range of thermal expansion coefficients. For applications in which thermal shock is absent and thermal stability is not critical, BK7 glass is a suitable and inexpensive material. For applications requiring high thermal stability or involving severe thermal shock, UV grade fused silica is a good choice. Plano-concave windows Presented substrates are uncoated. For appropriate coating, please refer to the Coatings section. Catalogue number BK7 Most of Curved Windows are available for fast off-the-shelf delivery. Check the availability at www.eksmaoptics.com Polarizing Optics Housing accessories UV & IR Optics Kinematic Mirror Mount 840-0020 Please add letter M to the catalogue number for metric dimensions and letter E for English. Call us for other size, radius of curvature, or precision requirements.

Windows & Filters Plano-convex windows Catalogue number BK7 Windows & Filters Presented substrates are uncoated. For appropriate coating, please refer to the Coatings section. Please add letter M to the catalogue number for metric dimensions and letter E for English. ELLIPTICAL WINDOWS Specifications Thickness Tolerance Axis Tolerance Minor axis Elliptical windows bend light at precise angles with minimum wave distortion due to elongated major axis. Precision 45 degree elliptical flat mirrors are ideal for technical and astronomical applications. Standard High Reflectivity Coatings see page 1.3...

OPTICAL COMPONENTS FLAT WINDOWS • Have high transmittance, low wavefront distortion • BK7 glass is an economical and ideal choice for high-quality visible applications • UV FS has the deepest UV range and the highest inclusion free materials are used. Windows are used to allow optical ra- diation to pass from one environment to another without allowing other com- ponents of these environments to mix. Considerations in selecting windows may include transmission, scattering, wavefront distortion and resistance to certain environ- ments. An ideal window allows an optical beam to pass from one medium...

Windows & Filters Specifications Material Clear aperture Diameter tolerance Thickness tolerance Surface flatness Surface quality Windows & Filters Precision Thin Round Windows Please add letter M to the catalogue number for metric dimensions and letter E for English. Housing accessories Optical Component Mount 830-0037 Universal Plate Holder 830-0075 These windows are designed to be used in precision optical systems. The optical transmission is high with little distortion of the transmitted signal. λ/10 transmitted wavefront distortion is usually preferred but λ/4 is offered as an option when...

Optical Components Round Windows Coatings Catalogue number Housing accessories Windows & Filters Wind ows Fil ters Kinematic Mirror and Beamsplitter Mount 840-0030-02 Please add letter M to the catalogue number for metric dimensions and letter E for English. Rectangular Windows Surface flatness: λ/10 @633nm. Parallelism: <30 arcsec UV FS Catalogue number Rectangular dimensions Polarizing Optics Related products We offer AR Coated Precision Windows for Nd:YAG laser applications See page 4.10 Rectangular Optics Holders 830-0100, 830-0110 See page 8.54 For applications where fine adjusment is required,...

Windows & Filters Optical Flats Coatings Optical flats are used for testing and evaluating other optical elements. An interference pattern is formed in the air between the flat and object being evaluated, and this pattern is usually more easily seen through the flat than through the object. The pattern consists of alternating bright and dark bands or fringes which are a contour map of the thickness of the air film. If the surface of the optic is significantly flatter than the surface being evaluated, it is correct to interpret the interference pattern directly as a contour map of the surface...

Optical Components NEUTRAL DENSITY ABSORPTION TYPE FILTERS AT 450-650 nm Coatings Neutral density absorption type filters decrease the intensity of light without altering the relative spectral distribution of energy. They are used to filter the entire visible spectrum evenly, allowing light reduction without influencing the colour or contrast. Attenuation is accomplished by using light-absorbing glass. Specifications Neutral density colour glass Surface quality Surface flatness Diameter tolerance Clear aperture Design wavelength Optical density tolerance Windows & Filters Wind ows Fil ters External...

Windows & Filters NEUTRAL DENSITY REFLECTIVE TYPE FILTERS AT 400-2000 nm Coatings Glass Material Surface Quality Surface Flatness Outer Diameter Laser Damage Threshold Design Wavelength Optical Density Tolerance Windows & Filters Neutral density reflective type filters of 1’’ (25.4 mm) size with optical density that varies from 0.1 to 2.5 are available. Neutral density filters of Corning 7059 glass provide spectrally uniform attenuation from 400 nm to 2000 nm. The reflective coatings enable to reduce thermal effects when these filters are used with moderate power lasers. Optical Density Catalogue...

Optical Components COLOR GLASS FILTERS Windows & Filters Wind ows Fil ters External transmission, % Schott colour glass Surface quality Surface flatness Diameter tolerance Clear aperture Custom sizes and shapes are available upon request. Related products Rectangular Optics Holders 830-0100, 830-0110 External transmission curves (include reflections from uncoated surfaces) External transmission, % Polarizing Optics External transmission, % Color glass filters are made from optically polished highest quality Schott coloured optical glass. The spectral properties of these filters are uniform over...