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Spherical Bi-Convex Lenses
MATERIAL - KRS-5 (Thallium Bromide-Iodide)
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KRS-5 - transparent in wide spectral range from 0.6 microns (red, visible) to 50 microns (far IR).
Crystaltechno Ltd. manufactures spherical bi-convex lenses from fused silica, glass and different types of optical crystals, including KRS-5 (Thallium Bromide-Iodide).
Spherical bi-convex lenses are widely used as focusing transfer optics.
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PARAMETER |
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VALUE |
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Surface figure |
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Without requirements |
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Scratch-Dig |
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80 - 50 |
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Diameter tolerance |
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± 0.2 mm |
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Paraxial Focal Length Tolerance |
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± 2% |
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Centration |
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less than 5 arc minutes |
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Clear aperture |
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90 % |
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Bevels |
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(0.2-0.5) mm x 45° |
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