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Lens

Lenses have many applications ranging from the simple collection of the scanning of laser beams to precise imaging and image transfer. CRYSTECH provide these lenses for different application. Keywords: Laser Lens, Lens
Affiliate classification
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Product description

Lenses

Materials

Illustration

Property and Application

Plano-convex

BK7
Fused Silica
CaF2

      

Positive focus length. Most suitable where one conjugate is more than five times the other, e.g. in sensor application or for use with near collimated light.

Double-convex

BK7
Fused Silica
CaF2

      

Most suitable where the conjugates are on opposite sides of the lenses and the ratio of the distances is less than 5:1, e.g. as simple image relay components.

Plano-concave

Fused Silica

      

Negative lens with the form most suitable where one conjugates is more than five times the other, e.g. producing divergent light from a collimated input beam.

Double-concave

BK7
Fused Silica
CaF

      

Negative lens with the form most suited to producing diverging light or a virtual image, where the input light is converging.

Meniscus

Positive

BK7

      

These lenses may be used to increase the numerical aperture of a positive lens assembly, without an undue increase in the aberrations.

Negative

BK7

     

The best lens form where one conjugates is relatively far from the lens or where both conjugates are the same size of the lens.

Cylindical

BK7

Fused Silica

      

Used to provide focusing power in one section only. For illumination or detection of light from line sources. Also used to anamorphic compression of beams and images.

Specifications
Material: BK7, Fused Silica, etc.
Diameter Tolerance: +0/-0.2mm
Center Thickness Tolerance: +/-0.2mm
Surface Accuracy: <L/2 @ 632.8nm 
Focal Length Tolerance: ±2%
Centratiion: < 3 arc minutes
Clear Aperture: >90%
Surface Quality: Scratch/Dig 40/20 
Bevel: 0.25 mm x 45°
 
 
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