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HOME > PRODUCTS > Precision Optics > Lenses > Meniscus Lenses > BK7 Positive >

BK7 Positive

Specifications:

Material: BK7 Grade A Optical Glass
Design Wavelength: 546.1nm
Design Index: 1.5183 ±0.0005
Diameter Tolerance: +0.0, -0.15mm
Paraxial Focal Length: ±2%
Centration: 3 arc minutes
Clear Aperture: >80%
Surface Figure: l[email protected]
Surface Quality: 60-40 scratch and dig
Bevel: 0.25 mm x 45°

Part No.	f (mm)	f (mm)	R₁ (mm)	R₂ (mm)	t_c (mm)	t_e (mm)	f_b (mm)
MP0101	100.0	25.4	33.72	90.00	4.0	2.5	97.5
MP0102	125.0	25.4	38.47	90.00	4.0	2.8	121.8
MP0103	150.0	25.4	42.52	90.00	4.0	3.0	146.3
MP0104	175.0	25.4	46.05	90.00	4.0	3.1	171.2
MP0105	200.0	25.4	49.03	90.00	3.5	2.8	197.0
MP0106	250.0	25.4	83.96	235.00	3.5	2.9	246.5
MP0107	300.0	25.4	94.08	235.00	3.5	3.0	296.3
MP0108	350.0	25.4	102.90	235.00	3.5	3.1	346.0
MP0109	400.0	25.4	110.72	235.00	3.5	3.1	395.8
MP0110	500.0	25.4	123.90	235.00	3.5	3.2	495.4
MP0111	600.0	25.4	204.95	600.00	3.5	3.2	595.3
MP0112	800.0	25.4	245.39	600.00	3.5	3.3	794.5
MP0113	1000.0	25.4	278.34	600.00	3.5	3.3	993.7
MP0114	1500.0	25.4	339.05	600.00	3.5	3.4	1492.0
MP0115	2000.0	25.4	380.54	600.00	3.5	3.4	1990.2
MP0116	4000.0	25.4	466.12	600.00	3.5	3.5	3984.5

	Please refer to the Material Chapter for more information about BK7 glass, UV grade fused silica, Sapphire and CaF2.
	Please refer to the Glossary and Technology for more information about lenses.
	Please refer to Coating Chapter for more infomation of coating.
	Other sizes and coatings are available upon request.
	lPlease refer to Ring Mount for Lenses