Double-Concave Lenses

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Double-Concave Lenses

Double concave lenses are symmetrical with equal radius on both sides.

Centration, arcmin	<3 arcmin
Clear Aperture, %	>90%
Coatings	Available on request
Design Wavelength, nm	632.8 nm
Diameter Tolerance, mm	+0.0/-0.1 mm
Focal Length Tolerance, %	±3 %
Protective chamfers	<0,25 mm x 45 deg
Surface Figure	<λ/4@632.8 nm
Surface Quality, S-D	40/20 S/D
Thickness Tolerance, mm	±0.1 mm

Description

Details

The biconcave lenses are used in optical systems in combination with other lenses. These lenses also work as beam expanders, optical character readers, viewers and projection systems. Under customer request anti-reflection or other types of coatings can applied.

Features

Lower spherical aberrations than for Plano-Concave lenses
Diverges incident light
Ideal for Experimenting and Prototyping Applications

Applications

Properties (Diameter D, Focal length L)

D, mm	D, Inches	L Minimal, mm	L Maximal, mm
12,7	0.5	-12	-10.000
25,4	1	-25	-10.000
38,1	1.5	-40	-10.000
50,8	2	-50	-10.000
76,2	3	-75	-10.000

Name	Diameter, mm	Edge Thickness, mm	Focal Length, mm	Material	ROC1, mm	ROC2, mm	Price	Quantity
1-BCV-1-A127	12.7	5	-12	BK7	-12.59	12.59	US$41.60
1-BCV-1-A254	25.4	8	-25	BK7	-26.11	26.11	US$49.40
1-BCV-1-B127	12.7	5	-15	BK7	-15.85	15.85	US$39.00
1-BCV-1-B254	25.4	8	-30	BK7	-31.41	31.41	US$44.20
1-BCV-1-C127	12.7	4.5	-20	BK7	-21.11	21.11	US$36.40
1-BCV-1-C254	25.4	7	-35	BK7	-36.71	36.71	US$41.60
1-BCV-1-D254	25.4	7	-50	BK7	-52.16	52.16	US$39.00
1-BCV-2-A127	12.7	5	-15	UVFS	-14.11	14.11	US$67.60
1-BCV-2-A254	25.4	8	-30	UVFS	-27.81	27.81	US$78.00
1-BCV-2-B127	12.7	5	-20	UVFS	-18.75	18.75	US$62.40
1-BCV-2-B254	25.4	8	-40	UVFS	-37.12	37.12	US$75.40
1-BCV-2-C127	12.7	4.5	-25	UVFS	-23.32	23.32	US$62.40
1-BCV-2-C254	25.4	7	-50	UVFS	-46.43	46.43	US$75.40