Optical Lens BK7 ZF2 Achromatic Doublet lens
$10-50 /Piece/Pieces
Payment Type: | L/C,T/T |
Incoterm: | FOB,CIF,EXW |
Min. Order: | 10 Piece/Pieces |
Transportation: | Air |
Port: | Changchun,BEIJING,DALIAN |
Model No.: RQ-Achromatic Doublet lens
Brand: CCRQ
Support Customization: Oem, Odm
Place Of Origin: China
Surface Quality: 40/20 20/10
Irregularity: lambda/2 @632.8nm
Use: Achromatic
Structure: Plano-Concave
Shape: Cylindrical
Dia.tolerance: +/-0.1mm
Diameter.: 5-300mm
Optical Usage BK7 ZF2 Achromatic Lens
An achromatic lens or Achromatic Objective Lens is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus in the same plane.
The most common type of achromat is the Achromatic Doublet Lenses, which is composed of two individual lenses made from glasses with different amounts of dispersion. Typically, one element is a negative (concave) element made out of flint glass such as F2, which has relatively high dispersion, and the other is a positive (convex) element made of crown glass such as BK7, which has lower dispersion. The Optical Lens elements are mounted next to each other, often cemented together, and shaped so that the chromatic aberration of one is counterbalanced by that of the other.
In the most common type (shown), the positive power of crown lens element is not quite equalled by the negative power of the flint lens element. Together optical glass lens form a weak positive lens that will bring two different wavelengths of light to a common focus. Negative doublets, in which the negative-power element predominates, are also made.
Technical Specifications:
Material | BK7,ZF2 |
Dimension | 30mm 50mm circular |
Dimension Tolerance | +/-0.15mm |
Centration | <3' |
Surface Quality | 60/40 |
Flatness | lambda/4 per 25nm at 632.8nm |
Focal length | +/-3% |
Edge | Fine ground and beveled |
Coating | Anti-Reflective (AR) Coatings,Single layer MgF2 coating,Multilayer Broadband AR Coating |
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