Spheric Lenses
 


 

 

Lenses have many applications ranges from the simple collection of the scanning of laser beams to precise imaging and image transfer. 

 

 

Lenses

Materials

Illustration

Property and Application

Negative Achromatic Lenses

Optical glass type,fine annealed or UV grade fused silica 

Achromatic Lenses have considerably reduced values of spherical aberrations. Best used to replace single components where performance must be improved.

Positive Achromatic Lenses

Optical glass type,fine annealed or UV grade fused silica

Acromatec Lenses have considerably reduced values of spherical aberrations. Best used to replace single components where performance must be improved.

Plano-convex

Sapphire
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

Sapphire
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

Sapphire
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 (for Achromatic Double Lenses only)
 
 
Material:                                        Optical glass type,fine annealed or UV grade fused silica etc.
Paraxial Focal Length Tolerance:     2%
Dimension Tolerance:                     +0.0/-0.15mm
Center thickness tolerance:            +/-0.2mm
Clear Aperture:                              90% of diameter
Surface Quality:                             60/40
Coating:                                        Uncoated,AR,PR,HR,etc.
 

 

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