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Glass Perfection UK – Optical Glass Manufacturers


Glass Perfection is a UK Company which manufactures Optical Windows, Filters and Components for production, custom fabrication or from stock.

Specialising in polished plano windows in a wide range of materials with over 20 years manufacturing experience, we offer low cost volume production.

Components
achromatic lens
Lenses
gold coatings
Windows
achromatic lens
Prisms
scientific optical manufacturers
Beam Splitters
achromatic lens
Polarizers
schott filter glass
Waveplates
double concave lenses
glass perfection
Lenses > Double Concave

Double-concave lenses have two inward curved sides and negative focal length. They are used for image reduction and to spread light

Double Concave Lenses

o: diameter
tc: centre thickness
te: edge thickness
P: principal point
f: focal length
fb: back focal point
fp: focal Point

Specifications:

Diameter Tolerence: +0mm - 0.25mm
Edge/Centre Thickness Tolerence: +/- 0.25mm
Edge Finish: fine ground, beveled
Clear Aperture Diameter: 80% of central diameter
Surface Figure: ^/4 @ 632.8 nm
Surface Quality: 60-40 scratch and dig
Bevel: 0.25mm x 45 degree
Focal Length Tolerence: +/-2%
Back Focal Lenght Tolerence +/-2%

Material:

Material:

BKY grade A optical glass - n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica - n=1.4608+/-0.0005 (@546.1nm)

Anti-reflection Coating Available.

To improve transmittace we can supply your lenses coated with a single layer (broad band) or multi layer (narrow band) anti-reflection coating on both sides.

 
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