Back to Main Category
Bi-Concave-Model

Bi-Concave Lens

Bi-concave lenses have two inward curved surfaces. These lenses have a negative focal length. Our catalog bi-concave lenses have an identical curvature on both sides of the lens and are therefore symmetric. At unit conjugation, coma and distortion are cancelled out due to the symmetry. They are used to diverge incoming light or increase the focal length of an existing optical system.

Diameter Dia. Tolerance CT Tolerance Centering Irregularity Surface Quality Bevel
5.00-25.00 +0.00 / -0.10 ±0.1 < 3 minutes 0.5 Waves 40-20 0.25 x 45°
25.01 - 50.00 +0.00 / -0.10 ±0.1 < 3 minutes 0.5 Waves 60-40 0.50 x 45°
50.01-100.00 +0.00 / -0.10 ±0.1 < 3 minutes 0.5 Waves 60-40 0.50 x 45°
Dimensions MM
Clear Aperture CA >= 90% of Diameter
Flat Annulus Dia > 50 mm - Flat = 0.25 +0/-0.20
Dia > 50 mm - Flat = 0.50 +0/-0.40
Coating Uncoated, Specify your coating (See Coating Chart for Available Options)
Design Wavelength 587.6nm
Focal Length Tolerance ±2%
Edge Thickness Reference
* All dimensions are in mm
Bi-Concave-Model
  to  
  to  
Part Number Diameter Effective Focal Length Back Focal Length Center Thickness Edge Thickness  
L-BCC126 95 -150 -151.5 3 17.5 Add to Quote
L-BCC125 76.2 -150 -150.8 2.5 10.15 Add to Quote
L-BCC124 63.5 -300 -300.6 2 5.3 Add to Quote
L-BCC123 50.8 -500 -501 2.5 3.51 Add to Quote
L-BCC122 50.8 -250 -250.6 2.5 4.52 Add to Quote
L-BCC121 50.8 -200 -200.8 2.5 5.03 Add to Quote
L-BCC120 50.8 -150 -150.8 2.5 5.88 Add to Quote
L-BCC119 50.8 -100 -100.6 2.5 7.59 Add to Quote
L-BCC118 50 -1000 -1000.8 2.5 3.1 Add to Quote
L-BCC117 50 -750 -750.8 2.5 3.3 Add to Quote
L-BCC116 50 -600 -603 2 3 Add to Quote
L-BCC115 50 -500 -500.8 2.5 3.7 Add to Quote
L-BCC114 50 -400 -400.8 2.5 4.1 Add to Quote
L-BCC113 50 -300 -300.8 2.5 4.5 Add to Quote
L-BCC112 50 -250 -250.8 2.5 4.9 Add to Quote
L-BCC111 50 -200 -201.4 2 4.9 Add to Quote
L-BCC110 50 -150 -151.2 2 5.9 Add to Quote
L-BCC109 50 -125 -125.8 2.5 7.3 Add to Quote
L-BCC108 50 -100 -101 2 7.9 Add to Quote
L-BCC107 50 -75 -75.8 2.5 10.7 Add to Quote
L-BCC105 50 -50 -50.8 2.5 15.3 Add to Quote
L-BCC096 40 -250 -250.6 1.9 3.5 Add to Quote
L-BCC095 40 -200 -200.7 2.2 4.1 Add to Quote
L-BCC094 40 -150 -150.7 2.1 4.6 Add to Quote
L-BCC093 40 -100 -100.7 2.2 6 Add to Quote
L-BCC092 40 -50 -50.5 1.4 9.6 Add to Quote
L-BCC091 38.1 -500 -500.9 2.5 3.06 Add to Quote
L-BCC090 38.1 -250 -250.6 2.5 3.63 Add to Quote
L-BCC089 38.1 -200 -200.8 2.5 3.92 Add to Quote
L-BCC088 38.1 -150 -150.8 2.5 4.39 Add to Quote
L-BCC087 38.1 -100 -100.6 2.5 5.35 Add to Quote
L-BCC086 38.1 -75 -75.6 2.5 6.31 Add to Quote
L-BCC085 38.1 -50 -50.8 2.5 8.3 Add to Quote
L-BCC074 30 -200 -201.4 2 3.1 Add to Quote
L-BCC073 30 -100 -101 2 4.1 Add to Quote
L-BCC072 0 0 0 0 0 Add to Quote
L-BCC071 30 -50 -50.8 2 6.3 Add to Quote
L-BCC070 30 -30 -30.8 2 9.4 Add to Quote
L-BCC069 30 -150 -151.2 2 3.4 Add to Quote
L-BCC068 25.4 -200 -200.8 2.5 3.13 Add to Quote
L-BCC067 25.4 -150 -150.8 2.5 3.34 Add to Quote
L-BCC066 25.4 -100 -100.6 2.5 3.76 Add to Quote
L-BCC065 25.4 -75 -75.6 2.5 4.18 Add to Quote
L-BCC064 25.4 -50 -50.8 2.5 5.03 Add to Quote
L-BCC063 25.4 -25 -25.8 2.5 7.73 Add to Quote
L-BCC062 25 -500 -500.5 1.5 1.9 Add to Quote
L-BCC061 25 -400 -400.5 1.5 1.9 Add to Quote
L-BCC060 25 -300 -300.5 1.5 2.1 Add to Quote
L-BCC059 25 -250 -250.5 1.5 2.1 Add to Quote
L-BCC058 25 -200 -200.5 1.5 2.3 Add to Quote
L-BCC057 25 -150 -150.5 1.5 2.5 Add to Quote
L-BCC056 25 -125 -125.5 1.5 2.7 Add to Quote
L-BCC055 25 -100 -100.5 1.5 3.1 Add to Quote
L-BCC054 25 -60 -60.5 1.5 4.1 Add to Quote
L-BCC053 25 -50 -50.5 1.5 4.5 Add to Quote
L-BCC051 25 -40 -40.5 1.5 5.3 Add to Quote
L-BCC050 25 -30 -30.5 1.5 6.7 Add to Quote
L-BCC049 25 -75 -75.5 1.5 3.5 Add to Quote
L-BCC046 22.4 -40 -40.8 2 4.9 Add to Quote
L-BCC045 20 -70 -70.9 2 3.3 Add to Quote
L-BCC044 20 -40 -40.5 1.5 3.6 Add to Quote
L-BCC043 20 -35 -35.8 2 4.7 Add to Quote
L-BCC042 20 -20 -20.7 2 6.8 Add to Quote
L-BCC030 13 -30 -30.8 2 3.3 Add to Quote
L-BCC029 12.7 -100 -100.6 2.5 2.81 Add to Quote
L-BCC028 12.7 -75 -75.6 2.5 2.92 Add to Quote
L-BCC027 12.7 -12.5 -13.3 2.5 5.07 Add to Quote
L-BCC026 12.5 -250 -250.5 1.5 1.7 Add to Quote
L-BCC025 50.8 -75 -75.6 2.5 9.35 Add to Quote
L-BCC024 12.5 -200 -200.5 1.5 1.7 Add to Quote
L-BCC023 12.5 -150 -150.5 1.5 1.7 Add to Quote
L-BCC022 12.5 -125 -125.5 1.5 1.9 Add to Quote
L-BCC021 12.5 -100 -100.5 1.5 1.9 Add to Quote
L-BCC020 12.5 -75 -75.5 1.5 2.1 Add to Quote
L-BCC019 12.5 -60 -60.5 1.5 2.1 Add to Quote
L-BCC018 12.5 -50 -50.5 1.5 2.3 Add to Quote
L-BCC017 12.5 -40 -40.5 1.5 2.5 Add to Quote
L-BCC016 12.5 -35 -35.5 1.5 2.5 Add to Quote
L-BCC015 12.5 -30 -30.5 1.5 2.7 Add to Quote
L-BCC014 12.5 -25 -25.5 1.5 3.1 Add to Quote
L-BCC013 25 -25 -25.7 2 8.1 Add to Quote
L-BCC012 12.5 -20 -20.5 1.5 3.5 Add to Quote
L-BCC011 12.5 -15 -15.5 1.5 4.1 Add to Quote
L-BCC010 20 -30 -30.7 2 5.1 Add to Quote
L-BCC009 12.7 -50 -50.8 2.5 3.12 Add to Quote
L-BCC008 12.7 -25 -25.8 2.5 3.75 Add to Quote
L-BCC007 12 -12 -12.7 2 4.8 Add to Quote
L-BCC005 6.35 -6.25 -7 2.5 3.75 Add to Quote
L-BCC004 6 -8 -8.6 2 2.9 Add to Quote
L-BCC001 5 -5 -5.6 2 3 Add to Quote
L-BCC000 6.35 -12.5 -13.3 2.5 3.12 Add to Quote