Dvipusiai įgaubti lęšiai

Material	BK7, FS, UVFS, CaF2, ZnSe, Si, Ge
Diameter tolerance	+0.0/-0.1 mm
Thickness tolerance	±0.1 mm
Clear aperture	>90%
Focal Length Tolerance	±3 %
Design wavelength	632.8 nm
Surface quality	40-20 S-D
Surface figure	<λ/4 @ 632.8 nm
Centration error	<3 arcmin
Protective chamfers	<0.25 mm x 45°
Coatings	Available on request

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Aprašymas Savybės Tables Metrology

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.

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

Altechna metrology lab applies following product inspection:

Visual inspection – surface quality evaluation according to MIL 13830 and ISO 10110 standards

Dimensions – measurement of geometrical dimensions, as diameter, thickness, etc.

Radius of Curvature (Spherometer)*

Effective Focal Length (Spherometer)

Centering (Centration unit)

Irregularity (Interferometer)

Wavefront distortion (Interferometer)

*(…) used equipment

Užsisakykite produktą

Diameter, mm	Edge Thickness, mm	Focal length, mm	Material	ROC1, mm	ROC2, mm	Delivery	Product ID	Price	Action

12.7	5.0	-12	BK7	-12.59	12.59	Request	1-BCV-1-A127	Request	REQ
12.7	5.0	-15	BK7	-15.85	15.85	Request	1-BCV-1-B127	Request	REQ
12.7	4.5	-20	BK7	-21.11	21.11	Request	1-BCV-1-C127	Request	REQ
25.4	8.0	-25	BK7	-26.11	26.11	Request	1-BCV-1-A254	Request	REQ
25.4	8.0	-30	BK7	-31.41	31.41	Request	1-BCV-1-B254	Request	REQ
25.4	7.0	-35	BK7	-36.71	36.71	Request	1-BCV-1-C254	Request	REQ
25.4	7.0	-50	BK7	-52.16	52.16	Request	1-BCV-1-D254	Request	REQ
12.7	5.0	-15	UVFS	-14.11	14.11	Request	1-BCV-2-A127	Request	REQ
12.7	5.0	-20	UVFS	-18.75	18.75	Request	1-BCV-2-B127	Request	REQ
12.7	4.5	-25	UVFS	-23.32	23.32	Request	1-BCV-2-C127	Request	REQ
25.4	8.0	-30	UVFS	-27.81	27.81	Request	1-BCV-2-A254	Request	REQ
25.4	8.0	-40	UVFS	-37.12	37.12	Request	1-BCV-2-B254	Request	REQ
25.4	7.0	-50	UVFS	-46.43	46.43	Request	1-BCV-2-C254	Request	REQ