Lentilles biconcaves

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Lentilles biconcaves

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

Centration, arcmin	<3 arcmin
Ouverture utile, %	>90%
Traitements	Available on request
Longueur d'onde de conception, nm	632.8 nm
Tolérances de diamètre, mm	+0.0/-0.1 mm
Tolérance distance focale, %	±3 %
Chanfreins de protection	<0,25 mm x 45 deg
Surface Figure	<λ/4@632.8 nm
Qualité de surface, s-d	40/20 S/D
Tolérance d'épaisseur, mm	±0.1 mm

Description

Détails

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.

Fonctionnalités

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	Diamètre, mm	Épaisseur au bord, mm	Distance Focale, mm	Material	ROC1, mm	ROC2, mm	Prix	Quantité
1-BCV-1-A127	12.7	5	-12	BK7	-12.59	12.59	41,60 $US
1-BCV-1-A254	25.4	8	-25	BK7	-26.11	26.11	49,40 $US
1-BCV-1-B127	12.7	5	-15	BK7	-15.85	15.85	39,00 $US
1-BCV-1-B254	25.4	8	-30	BK7	-31.41	31.41	44,20 $US
1-BCV-1-C127	12.7	4.5	-20	BK7	-21.11	21.11	36,40 $US
1-BCV-1-C254	25.4	7	-35	BK7	-36.71	36.71	41,60 $US
1-BCV-1-D254	25.4	7	-50	BK7	-52.16	52.16	39,00 $US
1-BCV-2-A127	12.7	5	-15	UVFS	-14.11	14.11	67,60 $US
1-BCV-2-A254	25.4	8	-30	UVFS	-27.81	27.81	78,00 $US
1-BCV-2-B127	12.7	5	-20	UVFS	-18.75	18.75	62,40 $US
1-BCV-2-B254	25.4	8	-40	UVFS	-37.12	37.12	75,40 $US
1-BCV-2-C127	12.7	4.5	-25	UVFS	-23.32	23.32	62,40 $US
1-BCV-2-C254	25.4	7	-50	UVFS	-46.43	46.43	75,40 $US