Spherical Lenses

Bi-Concave Lenses

Bi-Concave Lens has a negative focal length, and is often used for expanding light or increasing focal length in various optical systems. They are commonly applied for beam expanders, projection systems, optical readers etc. Metal housing, standard and broadband antireflection coatings are available upon request, see our standard optics components below.

biconcave-lens.jpg

Specifications

Parameter Precision Standard
Diameter Tolerance: +0/-0.05mm +0/-0.1mm
Center Thickness Tolerance: +/-0.05mm +/-0.1mm
Focal Length Tolerance: +/-1% +/-1%
Surface Figure at 632.8 nm(over 90% diameter): λ /8 λ /4
Centration: < 2 arc min < 3 arc min
Surface Quality: 20-10 40-20
Clear Aperture: > 90% > 90%
Coating: custom custom

Bi-Concave Lenses

Diameter Focal Length Material Center Thickness Edge Thickness Part No.
Φ(mm) f (mm) name Tc(mm) Te(mm) Precision Standard
6.00 -8.00 BK7 1.92 3.00 KWWP 001 KWWS 001
6.35 -6.35 BK7 1.44 3.00 KWWP 002 KWWS 002
6.35 -12.50 BK7 2.23 3.00 KWWP 003 KWWS 003
6.35 -25.40 BK7 2.62 3.00 KWWP 004 KWWS 004
10.00 -15.00 BK7 1.37 3.00 KWWP 005 KWWS 005
10.00 -20.00 BK7 1.79 3.00 KWWP 006 KWWS 006
10.00 -30.00 BK7 1.90 2.70 KWWP 007 KWWS 007
10.00 -40.00 BK7 2.40 3.00 KWWP 008 KWWS 008
10.00 -55.00 BK7 2.56 3.00 KWWP 009 KWWS 009
12.70 -12.50 BK7 1.78 5.00 KWWP 010 KWWS 010
12.70 -15.00 BK7 2.35 5.00 KWWP 011 KWWS 011
12.70 -20.00 BK7 2.04 4.00 KWWP 012 KWWS 012
12.70 -25.00 BK7 1.44 3.00 KWWP 013 KWWS 013
12.70 -30.00 BK7 1.70 3.00 KWWP 014 KWWS 014
12.70 -35.00 BK7 1.89 3.00 KWWP 015 KWWS 015
12.70 -40.00 BK7 2.03 3.00 KWWP 016 KWWS 016
12.70 -50.00 BK7 2.22 3.00 KWWP 017 KWWS 017
12.70 -60.00 BK7 2.35 3.00 KWWP 018 KWWS 018
12.70 -75.00 BK7 2.48 3.00 KWWP 019 KWWS 019
12.70 -100.00 BK7 2.61 3.00 KWWP 020 KWWS 020
12.70 -125.00 BK7 2.69 3.00 KWWP 021 KWWS 021
12.70 -150.00 BK7 2.74 3.00 KWWP 022 KWWS 022
12.70 -200.00 BK7 2.81 3.00 KWWP 023 KWWS 023
12.70 -250.00 BK7 2.84 3.00 KWWP 024 KWWS 024
20.00 -20.00 BK7 1.96 7.00 KWWP 025 KWWS 025
20.00 -25.00 BK7 2.03 6.00 KWWP 026 KWWS 026
20.00 -30.00 BK7 2.74 6.00 KWWP 027 KWWS 027
20.00 -35.00 BK7 2.21 5.00 KWWP 028 KWWS 028
20.00 -50.00 BK7 3.07 5.00 KWWP 029 KWWS 029
20.00 -70.00 BK7 3.62 5.00 KWWP 030 KWWS 030
20.00 -75.00 BK7 3.72 5.00 KWWP 031 KWWS 031
20.00 -100.00 BK7 4.04 5.00 KWWP 032 KWWS 032
20.00 -125.00 BK7 4.23 5.00 KWWP 033 KWWS 033
20.00 -150.00 BK7 4.36 5.00 KWWP 034 KWWS 034
20.00 -200.00 BK7 4.52 5.00 KWWP 035 KWWS 035
20.00 -250.00 BK7 4.61 5.00 KWWP 036 KWWS 036
20.00 -350.00 BK7 4.72 5.00 KWWP 037 KWWS 037
22.00 -40.00 BK7 2.06 5.00 KWWP 038 KWWS 038
22.00 -50.00 BK7 2.66 5.00 KWWP 039 KWWS 039
22.00 -150.00 BK7 4.22 5.00 KWWP 040 KWWS 040
25.40 -25.00 BK7 2.45 9.00 KWWP 041 KWWS 041
25.40 -30.00 BK7 2.64 8.00 KWWP 042 KWWS 042
25.40 -40.00 BK7 3.05 7.00 KWWP 043 KWWS 043
25.40 -50.00 BK7 1.85 5.00 KWWP 044 KWWS 044
25.40 -60.00 BK7 2.39 5.00 KWWP 045 KWWS 045
25.40 -75.00 BK7 2.92 5.00 KWWP 046 KWWS 046
25.40 -100.00 BK7 3.44 5.00 KWWP 047 KWWS 047
25.40 -125.00 BK7 3.75 5.00 KWWP 048 KWWS 048
25.40 -150.00 BK7 3.96 5.00 KWWP 049 KWWS 049
25.40 -200.00 BK7 4.22 5.00 KWWP 050 KWWS 050
25.40 -250.00 BK7 4.38 5.00 KWWP 051 KWWS 051
25.40 -300.00 BK7 4.48 5.00 KWWP 052 KWWS 052
25.40 -400.00 BK7 4.61 5.00 KWWP 053 KWWS 053
25.40 -500.00 BK7 4.69 5.00 KWWP 054 KWWS 054
30.00 -30.00 BK7 2.39 10.00 KWWP 055 KWWS 055
30.00 -50.00 BK7 3.60 8.00 KWWP 056 KWWS 056
30.00 -100.00 BK7 3.83 6.00 KWWP 057 KWWS 057
30.00 -200.00 BK7 3.91 5.00 KWWP 058 KWWS 058
38.10 -40.00 BK7 2.82 12.00 KWWP 059 KWWS 059
38.10 -50.00 BK7 2.79 10.00 KWWP 060 KWWS 060
38.10 -100.00 BK7 2.47 6.00 KWWP 061 KWWS 061
38.10 -125.00 BK7 3.19 6.00 KWWP 062 KWWS 062
38.10 -150.00 BK7 3.66 6.00 KWWP 063 KWWS 063
38.10 -200.00 BK7 4.25 6.00 KWWP 064 KWWS 064
38.10 -250.00 BK7 4.60 6.00 KWWP 065 KWWS 065
38.10 -500.00 BK7 5.30 6.00 KWWP 066 KWWS 066
38.10 -750.00 BK7 5.53 6.00 KWWP 067 KWWS 067
42.00 -50.00 BK7 3.18 12.00 KWWP 068 KWWS 068
42.00 -100.00 BK7 3.71 8.00 KWWP 069 KWWS 069
42.00 -250.00 BK7 4.30 6.00 KWWP 070 KWWS 070
42.00 -300.00 BK7 4.58 6.00 KWWP 071 KWWS 071
42.00 -400.00 BK7 4.94 6.00 KWWP 072 KWWS 072
42.00 -500.00 BK7 5.15 6.00 KWWP 073 KWWS 073
50.80 -50.00 BK7 2.81 16.00 KWWP 074 KWWS 074
50.80 -75.00 BK7 3.51 12.00 KWWP 075 KWWS 075
50.80 -100.00 BK7 3.70 10.00 KWWP 076 KWWS 076
50.80 -125.00 BK7 2.98 8.00 KWWP 077 KWWS 077
50.80 -150.00 BK7 3.83 8.00 KWWP 078 KWWS 078
50.80 -200.00 BK7 2.87 6.00 KWWP 079 KWWS 079
50.80 -250.00 BK7 3.50 6.00 KWWP 080 KWWS 080
50.80 -300.00 BK7 3.92 6.00 KWWP 081 KWWS 081
50.80 -400.00 BK7 4.44 6.00 KWWP 082 KWWS 082
50.80 -500.00 BK7 4.75 6.00 KWWP 083 KWWS 083
50.80 -600.00 BK7 4.96 6.00 KWWP 084 KWWS 084
50.80 -750.00 BK7 5.17 6.00 KWWP 085 KWWS 085
50.80 -1000.00 BK7 5.38 6.00 KWWP 086 KWWS 086