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Plano-Concave Lenses

Plano-Concave Lenses

These lenses are thicker at the edge than in the centre and flat on one side. The plano-concave lenses are used to expand light beams or to increase focal lengths in optical systems.

from 16 $
delivery Estimated delivery time: 4 - 5 days
Products
Specifications
Brochures
Description
Material
Focal Length
Diameter
Coating
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BK7, Size: dia 12.7 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
112-0105E BK7 -25 mm 12.7 mm -13.0 mm 1.9 mm 3.5 mm Uncoated 16 $ 4 - 5 days
i 112-0109E BK7 -50mm 12.7 mm -25.9 mm 2.7 mm 3.5 mm Uncoated 16 $ Request
i 112-0112E BK7 -60 mm 12.7 mm -31.1 mm 2.4 mm 3.1 mm Uncoated 16 $ Request
i 112-0115E BK7 -75 mm 12.7 mm -38.9 mm 2.9 mm 3.4 mm Uncoated 16 $ Request
i 112-0117E BK7 -100 mm 12.7 mm -51.9 mm 3 mm 3.4 mm Uncoated 16 $ Request
i 112-0119E BK7 -125 mm 12.7 mm -64.8 mm 3.1 mm 3.4 mm Uncoated 16 $ Request
i 112-0121E BK7 -150 mm 12.7 mm -77.8 mm 3.2 mm 3.5 mm Uncoated 16 $ Request
i 112-0123E BK7 -200mm 12.7 mm -103.7 mm 3.3 mm 3.5 mm Uncoated 16 $ 4 - 5 days
i 112-0125E BK7 -250 mm 12.7 mm -129.7 mm 3.3 mm 3.5 mm Uncoated 16 $ 4 - 5 days
i 112-0127E BK7 -300 mm 12.7 mm -155.6 mm 2.9 mm 3 mm Uncoated 16 $ 4 - 5 days
BK7, Size: dia 25.4 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-0205E BK7 -30 mm 25.4 mm -15.6 mm 1.4 mm 7.9 mm Uncoated 20 $ 4 - 5 days
i 112-0207E BK7 -40 mm 25.4 mm -20.7 mm 1.7 mm 5.9 mm Uncoated 20 $ 4 - 5 days
i 112-0209E BK7 -50 mm 25.4 mm -25.9 mm 2.8 mm 6 mm Uncoated 20 $ 4 - 5 days
i 112-0215E BK7 -75 mm 25.4 mm -38.9 mm 2.9 mm 4.9 mm Uncoated 19 $ 4 - 5 days
i 112-0219E BK7 -100 mm 25.4 mm -51.9 mm 3.1 mm 4.6 mm Uncoated 19 $ Request
i 112-0223E BK7 -125 mm 25.4 mm -64.8 mm 3 mm 4.2 mm Uncoated 19 $ 4 - 5 days
i 112-0227E BK7 -150 mm 25.4 mm -77.8 mm 2.7 mm 3.7 mm Uncoated 19 $ 4 - 5 days
i 112-0231E BK7 -200 mm 25.4 mm -103.7 mm 3 mm 3.8 mm Uncoated 19 $ 4 - 5 days
i 112-0235E BK7 -250 mm 25.4 mm -129.7 mm 3.1 mm 3.7 mm Uncoated 19 $ 4 - 5 days
i 112-0239E BK7 -300 mm 25.4 mm -155.6 mm 3.1 mm 3.6 mm Uncoated 19 $ 4 - 5 days
i 112-0243E BK7 -400 mm 25.4 mm -207.5 mm 3.6 mm 4 mm Uncoated 19 $ 4 - 5 days
i 112-0245E BK7 -450 mm 25.4 mm -233.4 mm 3.6 mm 3.9 mm Uncoated 19 $ 4 - 5 days
i 112-0247E BK7 -500 mm 25.4 mm -259.4 mm 3.7 mm 4 mm Uncoated 19 $ 4 - 5 days
i 112-0250E BK7 -650 mm 25.4 mm -337.2 mm 3.7 mm 3.9 mm Uncoated 19 $ 4 - 5 days
i 112-0252E BK7 -750 mm 25.4 mm -389.0 mm 3.8 mm 4 mm Uncoated 19 $ 4 - 5 days
i 112-0259E BK7 -1000 mm 25.4 mm -518.7 mm 3.8 mm 4 mm Uncoated 19 $ 4 - 5 days
i 112-0260E BK7 -1500 mm 25.4 mm -778.1 mm 3.9 mm 4 mm Uncoated 19 $ 4 - 5 days
i 112-0261E BK7 -2000 mm 25.4 mm -1037.4 mm 3.9 mm 4 mm Uncoated 19 $ 4 - 5 days
i 112-0263E BK7 -3000 mm 25.4 mm -1556.2 mm 3.9 mm 4 mm Uncoated 19 $ 4 - 5 days
i 112-0265E BK7 -5000 mm 25.4 mm -2593.6 mm 3.9 mm 3.9 mm Uncoated 19 $ 4 - 5 days
BK7, Size: dia 38.1 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-0409E BK7 -100 mm 38.1 mm -51.9 mm 2 mm 5.5 mm Uncoated 31 $ Request
i 112-0411E BK7 -150 mm 38.1 mm -77.8 mm 3.3 mm 5.6 mm Uncoated 31 $ Request
i 112-0415E BK7 -200 mm 38.1 mm -103.7 mm 4.1 mm 5.8 mm Uncoated 31 $ Request
i 112-0419E BK7 -300 mm 38.1 mm -155.6 mm 4.7 mm 5.8 mm Uncoated 31 $ 4 - 5 days
BK7, Size: dia 50.8 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-0502E BK7 -75 mm 50.8 mm -38.9 mm 3 mm 12 mm Uncoated 61 $ 4 - 5 days
i 112-0505E BK7 -100 mm 50.8 mm -51.9 mm 3.5 mm 10 mm Uncoated 54 $ Request
i 112-0506E BK7 -125 mm 50.8 mm -64.8 mm 5 mm 10 mm Uncoated 53 $ 4 - 5 days
i 112-0507E BK7 -150 mm 50.8 mm -77.8 mm 5 mm 9 mm Uncoated 51 $ 4 - 5 days
i 112-0509E BK7 -200 mm 50.8 mm -103.7 mm 5 mm 8 mm Uncoated 50 $ 4 - 5 days
i 112-0511E BK7 -250 mm 50.8 mm -129.7 mm 5 mm 7.5 mm Uncoated 50 $ 4 - 5 days
UVFS, Size: dia 12.7 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-1105E UVFS -25 mm 12.7 mm -11.9 mm 1.3 mm 3 mm Uncoated 52 $ 4 - 5 days
i 112-1109E UVFS -50 mm 12.7 mm -23.8 mm 2.2 mm 3 mm Uncoated 52 $ 4 - 5 days
i 112-1110E UVFS -60 mm 12.7 mm -28.5 mm 2.4 mm 3 mm Uncoated 52 $ Request
i 112-1111E UVFS -75 mm 12.7 mm -35.7 mm 2.5 mm 3 mm Uncoated 51 $ 4 - 5 days
i 112-1112E UVFS -80 mm 12.7 mm -38.0 mm 2.6 mm 3 mm Uncoated 51 $ 4 - 5 days
i 112-1114E UVFS -90 mm 12.7 mm -42.8 mm 2.6 mm 3 mm Uncoated 51 $ 4 - 5 days
i 112-1115E UVFS -100 mm 12.7 mm -47.6 mm 2.7 mm 3 mm Uncoated 51 $ 4 - 5 days
i 112-1117E UVFS -125 mm 12.7 mm -59.4 mm 2.7 mm 3 mm Uncoated 51 $ 4 - 5 days
i 112-1119E UVFS -150 mm 12.7 mm -71.3 mm 2.7 mm 3 mm Uncoated 51 $ 4 - 5 days
i 112-1121E UVFS -175 mm 12.7 mm -83.2 mm 2.8 mm 3 mm Uncoated 51 $ 4 - 5 days
i 112-1123E UVFS -200 mm 12.7 mm -95.1 mm 2.8 mm 3 mm Uncoated 51 $ 4 - 5 days
i 112-1127E UVFS -250 mm 12.7 mm -118.9 mm 2.8 mm 3 mm Uncoated 51 $ Request
UVFS, Size: dia 25.4 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-1203E UVFS -30 mm 25.4 mm -14.3 m 1.6 mm 9 mm Uncoated 83 $ 4 - 5 days
i 112-1205E UVFS -50 mm 25.4 mm -23.8 mm 1.9 mm 5.5 mm Uncoated 77 $ Request
i 112-1209E UVFS -75 mm 25.4 mm -35.7 mm 3.1 mm 5.3 mm Uncoated 77 $ 4 - 5 days
i 112-1211E UVFS -100 mm 25.4 mm -47.6 mm 3 mm 4.7 mm Uncoated 77 $ 4 - 5 days
i 112-1215E UVFS -125 mm 25.4 mm -59.4 mm 3 mm 4.4 mm Uncoated 77 $ 4 - 5 days
i 112-1217E UVFS -150 mm 25.4 mm -71.3 mm 3.1 mm 4.2 mm Uncoated 72 $ 4 - 5 days
i 112-1219E UVFS -200 mm 25.4 mm -95.1 mm 3.1 mm 4 mm Uncoated 72 $ 4 - 5 days
i 112-1221E UVFS -250 mm 25.4 mm -118.9 mm 3.3 mm 4 mm Uncoated 72 $ 4 - 5 days
i 112-1223E UVFS -300 mm 25.4 mm -142.7 mm 3.4 mm 4 mm Uncoated 72 $ 4 - 5 days
i 112-1227E UVFS -400 mm 25.4 mm -190.2 mm 3.6 mm 4 mm Uncoated 66 $ 4 - 5 days
i 112-1233E UVFS -500 mm 25.4 mm -237.8 mm 3.7 mm 4 mm Uncoated 66 $ 4 - 5 days
i 112-1239E UVFS -750 mm 25.4 mm -356.6 mm 3.8 mm 4 mm Uncoated 66 $ 4 - 5 days
i 112-1245E UVFS -1000 mm 25.4 mm -475.5 mm 3.8 mm 4 mm Uncoated 66 $ 4 - 5 days
i 112-1250E UVFS -2000 mm 25.4 mm -952.4 mm 3.9 mm 4 mm Uncoated 66 $ 4 - 5 days
112-1255E UVFS -5000 mm 25.4 mm -2380.0 mm 2 mm 2 mm Uncoated 66 $ 4 - 5 days
UVFS, Size: dia 38.1 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-1411E UVFS -100 mm 38.1 mm -47.6 mm 2.4 mm 6.4 mm Uncoated 121 $ 4 - 5 days
i 112-1415E UVFS -150 mm 38.1 mm -71.3 mm 3 mm 5.5 mm Uncoated 121 $ 4 - 5 days
i 112-1419E UVFS -200 mm 38.1 mm -95.1 mm 3 mm 4.9 mm Uncoated 121 $ Request
i 112-1427E UVFS -300 mm 38.1 mm -142.7 mm 4.3 mm 5.6 mm Uncoated 121 $ 4 - 5 days
UVFS, Size: dia 50.8 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-1509E UVFS -100 mm 50.8 mm -47.6 mm 5 mm 11.9 mm Uncoated 152 $ Request
i 112-1512E UVFS -150 mm 50.8 mm -71.4 mm 3.2 mm 7.9 mm Uncoated 152 $ 4 - 5 days
i 112-1517E UVFS -250 mm 50.8 mm -118.9 mm 3.1 mm 5.7 mm Uncoated 152 $ 4 - 5 days
i 112-1519E UVFS -300 mm 50.8 mm -142.8 mm 3.5 mm 5.8 mm Uncoated 152 $ 4 - 5 days
i 112-1527E UVFS -500 mm 50.8 mm -237.8 mm 4.7 mm 6 mm Uncoated 152 $ 4 - 5 days
i 112-1540E UVFS -2000 mm 50.8 mm -951.0 mm 5.8 mm 6 mm Uncoated 152 $ 4 - 5 days
CaF2, Size: dia 12.7 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-5105E CaF2 -25 mm 12.7 mm -10.5 mm 1.9 mm 4 mm Uncoated 77 $ 4 - 5 days
i 112-5109E CaF2 -50 mm 12.7 mm -20.9 mm 2 mm 3 mm Uncoated 77 $ 4 - 5 days
i 112-5111E CaF2 -75 mm 12.7 mm -31.4 mm 2.4 mm 3 mm Uncoated 77 $ 4 - 5 days
i 112-5115E CaF2 -100 mm 12.7 mm -41.8 mm 2.5 mm 3 mm Uncoated 77 $ 4 - 5 days
i 112-5120E CaF2 -150 mm 12.7 mm -62.7 mm 2.7 mm 3 mm Uncoated 77 $ 4 - 5 days
i 112-5125E CaF2 -200 mm 12.7 mm -83.6 mm 1.8 mm 2 mm Uncoated 77 $ Request
i 112-5130E CaF2 -250 mm 12.7 mm -104.6 mm 1.8 mm 2 mm Uncoated 77 $ Request
i 112-5135E CaF2 -500 mm 12.7 mm -209.1 mm 1.9 mm 2 mm Uncoated 77 $ Request
CaF2, Size: dia 25.4 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-5204E CaF2 -40 mm 25.4 mm -16.7 mm 2.5 mm 7.8 mm Uncoated 83 $ 4 - 5 days
i 112-5205E CaF2 -50 mm 25.4 mm -20.9 mm 2.7 mm 7 mm Uncoated 83 $ 4 - 5 days
i 112-5209E CaF2 -75 mm 25.4 mm -31.4 mm 2.8 mm 5.5 mm Uncoated 83 $ 4 - 5 days
i 112-5211E CaF2 -100 mm 25.4 mm -41.8 mm 3 mm 5 mm Uncoated 83 $ Request
i 112-5217E CaF2 -150 mm 25.4 mm -62.7 mm 2.7 mm 4 mm Uncoated 83 $ 4 - 5 days
i 112-5219E CaF2 -200 mm 25.4 mm -83.6 mm 3 mm 4 mm Uncoated 83 $ 4 - 5 days
i 112-5223E CaF2 -250 mm 25.4 mm -104.6 mm 3.2 mm 4 mm Uncoated 83 $ Request
i 112-5225E CaF2 -300 mm 25.4 mm -125.5 mm 3.4 mm 4 mm Uncoated 83 $ 4 - 5 days
i 112-5228E CaF2 -400 mm 25.4 mm -167.3 mm 3.5 mm 4 mm Uncoated 83 $ 4 - 5 days
i 112-5230E CaF2 -500 mm 25.4 mm -209.1 mm 2.6 mm 3 mm Uncoated 83 $ 4 - 5 days
i 112-5235E CaF2 -1000 mm 25.4 mm -418.2 mm 2.8 mm 3 mm Uncoated 83 $ 4 - 5 days
CaF2, Size: dia 50.8 mm
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-5519E CaF2 -200 mm 50.8 mm -83.6 mm 3.6 mm 7.2 mm Uncoated 198 $ Request
i 112-5525E CaF2 -300 mm 50.8 mm -125.5 mm 3 mm 5.6 mm Uncoated 198 $ 4 - 5 days
i 112-5530E CaF2 -500 mm 50.8 mm -209.1 mm 4 mm 5.5 mm Uncoated 198 $ Request
Stock Standard Lenses with AR Coatings
Code Material Focal Length Diameter ROC CT ET Coating Price Delivery Add to cart
i 112-1105E+AR1064HT UVFS -25 mm 12.7 mm -11.9 mm 1.3 mm 3 mm AR/AR@1064 nm, R<0.1% 167 $ 4 - 5 days
112-1109E+ARD1030HT UVFS -50 mm 12.7 mm -23.8 mm 2.2 mm 3 mm AR/AR@515+1030 nm, R<0.1% 178 $ Request
112-1121E+AR1030HT UVFS -175 mm 12.7 mm -83.2 mm 2.8 mm 3 mm AR/AR@1000-1060 nm, R<0.1% 166 $ 4 - 5 days
112-1205E+ARB300 UVFS -50 mm 25.4 mm -23.8 mm 1.9 mm 5.5 mm AR/AR@210-400 nm, R<2% 154 $ 4 - 5 days
112-1205E+AR515HT UVFS -50 mm 25.4 mm -23.8 mm 1.9 mm 5.5 mm AR/AR@500-530 nm, R<0.1% 193 $ 4 - 5 days
112-1205E+ARB800HT UVFS -50 mm 25.4 mm -23.8 mm 1.9 mm 5.5 mm AR/AR@700-900 nm, R<0.1% 204 $ Request
112-1211E+AR1030HT UVFS -100 mm 25.4 mm -47.6 mm 3 mm 4.7 mm AR/AR@1000-1060 nm, R<0.1% 193 $ 4 - 5 days
112-1211E+ARB1000HT UVFS -100 mm 25.4 mm -47.6 mm 3 mm 4.7 mm AR/AR@900-1100 nm, R<0.1% 204 $ Request
112-1215E+ARD1064HT UVFS -125 mm 25.4 mm -59.4 mm 3 mm 4.4 mm AR/AR@532+1064 nm, R<0.1% 204 $ 4 - 5 days
112-1217E+AR1030HT UVFS -150 mm 25.4 mm -71.3 mm 3.1 mm 4.2 mm AR/AR@1000-1060 nm, R<0.1% 187 $ Request
112-1217E+ARB800HT UVFS -150 mm 25.4 mm -71.3 mm 3.1 mm 4.2 mm AR/AR@700-900 nm, R<0.1% 198 $ 4 - 5 days
112-1217E+ARD1030HT UVFS -150 mm 25.4 mm -71.3 mm 3.1 mm 4.2 mm AR/AR@515+1030 nm, R<0.1% 198 $ Request
112-1219E+AR800HT UVFS -200 mm 25.4 mm -95.1 mm 3.1 mm 4 mm AR/AR@760-840 nm, R<0.1% 198 $ 4 - 5 days
112-1219E+ARD1030HT UVFS -200 mm 25.4 mm -95.1 mm 3.1 mm 4 mm AR/AR@515+1030 nm, R<0.1% 198 $ 4 - 5 days
112-1221E+AR800HT UVFS -250 mm 25.4 mm -118.9 mm 3.3 mm 4 mm AR/AR@760-840 nm, R<0.1% 187 $ 4 - 5 days
112-1223E+AR800HT UVFS -300 mm 25.4 mm -142.7 mm 3.4 mm 4 mm AR/AR@760-840 nm, R<0.1% 187 $ Request
112-1255E+AR800HT UVFS -5000 mm 25.4 mm -2377.5 mm 2 mm 4 mm AR/AR@760-840 nm, R<0.1% 182 $ 4 - 5 days
112-1509E+AR800HT UVFS -100 mm 50.8 mm -47.6 mm 5 mm 11.9 mm AR/AR@760-840 nm, R<0.1% 350 $ 4 - 5 days
112-1512E+AR800HT UVFS -150 mm 50.8 mm -71.4 mm 3.2 mm 7.9 mm AR/AR@760-840 nm, R<0.1% 350 $ 4 - 5 days
112-1517E+AR800HT UVFS -250 mm 50.8 mm -118.9 mm 3.1 mm 5.7 mm AR/AR@760-840 nm, R<0.1% 350 $ 4 - 5 days
112-1519E+AR800HT UVFS -300 mm 50.8 mm -142.8 mm 3.5 mm 5.8 mm AR/AR@760-840 nm, R<0.1% 350 $ 4 - 5 days
 Material  BK7, UV FS, CaF2
 Surface quality  40-20 scratch & dig (MIL-PRF-13830B)
 Clear aperture  90% of the diameter
Diameter tolerance +0.00-0.12 mm
Thickness tolerance ±0.2 mm
Surface irregularity λ/8 @ 633 nm
Surface irregularity for CaF2 λ/4 @ 633 nm
Concentricity 3 arcmin

Paraxial focal length:
  BK7
  UV FS
  CaF2


±2% @ 546 nm
±2% @ 355 nm
±2% @ 2940 nm

EKSMA Optics Plano-Concave Lenses
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  • Have negative focal lengths
  • Diverge collimated incident light
  • Forms only virtual images which are seen through the lens
  • Reduce spherical aberration, coma and distortion at negative-infinite or near-infinite conjugate ratios
  • With the concave surface facing the longest conjugate distance

These lenses are thicker at the edge than in the centre and flat on one side. The plano-concave lenses are used to expand light beams or to increase focal lengths in optical systems. They are often employed for beam expansion of high peak power pulsed lasers. A beam incident on a concave surface will be focused to a point outside the instrument.

Air heating and ionization at the unwanted focal point are possible with attendant mode disruption or material damage. To avoid this problem, the input lens should be reversed so that no concave surface faces a parallel beam.

A variety of anti-reflection coatings is available for these lenses. For appropriate coating please refer to the COATINGS section. We can supply custom cutting, edging, coating or complete fabrication if required.