Bi-concave glass lenses are manufactured with both surfaces concave. These lenses have negative focal lengths. These lenses diverge collimated incident light and form virtual images, which are seen through the lens. They are often used to expand light or increase focal lengths in existing systems. They are used in laser beam expanders, optical character readers, viewers, and projection systems. Antireflection coatings can be ordered as an option
Technical parameters:Wavelength 632.8nm,Focal length tolerance ±1%,Diameter tolerance +0.0/-0.1mm,Thickness tolerance ±0.1mm,Surface accuracy λ/4,Surface quality 40-20,Centration<3arcmin,clear aperture="">90%,Bevelling<0.2×45°,Coating A: AR Coating 350nm-650nm;B: AR Coating 650nm-1050nm;C: AR Coating 1050nm-1580nm.
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Fused silica lenses/ Rod lenses/ meniscus cylindrical lenses/ veneer lenses
Fused silica lenses/ Rod lenses/ meniscus cylindrical lenses/ veneer lenses
| Price: | 0.1~1.0 USD |
|---|---|
| Trade Term: | FOB |
| Payment Terms: | T/T,L/C |
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Basic Info.
- Brand Name: Tianhua
- Size: as you need
- Material: as your requirement
- Use: photoelectricit
- focal length tolerance: ±1%
- Diameter tolerance: +0.0/-0.1mm
- centration: less than 3arcmin
- Model No.: cylindrical
- Place of Origin: Jilin
- Min.Order: 1 Piece/Pieces
- Means of Transport: Air
Supply Capacity
- Production Capacity: 100000 pieces per month
- Packing:soft paper and box
- Delivery Date: 10days
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