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Bi-Convex Lenses

Bi-Convex Lenses
These lenses have a large range of lengths and are the optimum shape for producing
real images at 1:1 magnification. In a single lens application you should consider
using them in preference to a single plano-convex lens if the magnification
lies in the region of -5 <-0.2.
We specialize in the production of medium to large-size custom mirrors with exacting
tolerances, high grade surface finishes and difficult coatings. Please send
us your specification or drawing and we will be happy to return a quotation ASAP.
Our average response time is within 24 hours. Our optical designers are always
available to assist with your special needs and our factory in China is ready to
meet your quantity requirements.
1) Diameter: ?4 - 1000mm
2) Material: BK7 (K9), or as requested
3) Surface quality: up to 60-40 S&, or as requested
4) Surface accuracy: up to ?/4, or as requested
5) Clear aperture: > 90%
6) Diameter tolerance: +0.0/-(0.1-0.2) mm (depends on the dimension)
7) Focal length tolerance: ±2%
8) EFL: as requested
9) Surface figure: ?/4, or as requested
10) Centering tolerance: 3', or as requested
11) CT tolerance: ±0.15mm, or as requested
12) ET tolerance: as requested
13) Bevel: (0.25 - 1.0mm) x 45° (depends on the diameter)
14) Coating: as requested

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