crystaltechno : crystal optics manufacturer

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Lenses

Spherical Bi-Convex Lenses

BK-7

ZnS

ZnSe

CaF₂

BaF₂

MgF₂

LiF

	Material	Magnesium Fluoride
	Surface figure	Lambda/2 at 633 nm per inch
	Scratch-Dig	60 - 40
	Diameter tolerance	± 0.1 mm
	Paraxial Focal Length Tolerance	± 2%
	Centration	less than 5 arc minutes
	Clear aperture	90%
	Bevels	(0.2+0.3)mm x 45°

D, mm	FL, mm	R1=R2, mm	t_c, mm	t_e, mm	Part Number
12.7	12.7	7.14	9.8	2.0	BCX3-01
12.7	19.0	12.21	5.6	2.0	BCX3-02
12.7	25.0	16.40	4.6	2.0	BCX3-03
12.7	50.0	33.59	3.2	2.0	BCX3-04
25.4	25.0	14.44	17.1	2.0	BCX3-05
25.4	50.0	33.08	7.1	2.0	BCX3-06
25.4	75.0	50.33	5.3	2.0	BCX3-07
25.4	100	67.44	4.4	2.0	BCX3-08
25.4	150.0	101.54	3.6	2.0	BCX3-09
25.4	200.0	135.60	3.2	2.0	BCX3-10
25.4	250.0	169.63	3.0	2.0	BCX3-11
25.4	500.0	339.69	2.5	2.0	BCX3-12
38.1	50.0	31.89	15.6	3.0	BCX3-13
38.1	75.0	49.62	10.6	3.0	BCX3-14
38.1	100.0	66.90	8.5	3.0	BCX3-15
38.1	200.0	135.28	5.7	3.0	BCX3-16
38.1	375.0	254.44	4.4	3.0	BCX3-17
38.1	750.0	509.53	3.7	3.0	BCX3-18
38.1	FL, mm	R1=R2, mm	t_c, mm	t_e, mm	Part Number
* Numerical parameters correspond to Lambda=5 µm (n=1.34)