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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
Diameter
Focal Length
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BK7, Size: dia 12.7 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-0105E BK7 12.7 mm 1.9 mm 3.5 mm -13.0 mm -25 mm 16 $ 4 - 5 days
112-0109E BK7 12.7 mm 2.7 mm 3.5 mm -25.9 mm -50mm 16 $ 4 - 5 days
112-0112E BK7 12.7 mm 2.4 mm 3.1 mm -31.1 mm -60 mm 16 $ 4 - 5 days
112-0115E BK7 12.7 mm 2.9 mm 3.4 mm -38.9 mm -75 mm 16 $ 4 - 5 days
112-0117E BK7 12.7 mm 3 mm 3.4 mm -51.9 mm -100 mm 16 $ Request
112-0119E BK7 12.7 mm 3.1 mm 3.4 mm -64.8 mm -125 mm 16 $ 4 - 5 days
112-0121E BK7 12.7 mm 3.2 mm 3.5 mm -77.8 mm -150 mm 16 $ 4 - 5 days
112-0123E BK7 12.7 mm 3.3 mm 3.5 mm -103.7 mm -200mm 16 $ 4 - 5 days
112-0125E BK7 12.7 mm 3.3 mm 3.5 mm -129.7 mm -250 mm 16 $ 4 - 5 days
112-0127E BK7 12.7 mm 2.9 mm 3 mm -155.6 mm -300 mm 16 $ Request
BK7, Size: dia 25.4 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-0205E BK7 25.4 mm 1.4 mm 7.9 mm -15.6 mm -30 mm 20 $ 4 - 5 days
112-0207E BK7 25.4 mm 1.7 mm 5.9 mm -20.7 mm -40 mm 20 $ 4 - 5 days
112-0209E BK7 25.4 mm 2.8 mm 6 mm -25.9 mm -50 mm 20 $ 4 - 5 days
112-0215E BK7 25.4 mm 2.9 mm 4.9 mm -38.9 mm -75 mm 19 $ 4 - 5 days
112-0219E BK7 25.4 mm 3.1 mm 4.6 mm -51.9 mm -100 mm 19 $ 4 - 5 days
112-0223E BK7 25.4 mm 3 mm 4.2 mm -64.8 mm -125 mm 19 $ 4 - 5 days
112-0227E BK7 25.4 mm 2.7 mm 3.7 mm -77.8 mm -150 mm 19 $ 4 - 5 days
112-0231E BK7 25.4 mm 3 mm 3.8 mm -103.7 mm -200 mm 19 $ 4 - 5 days
112-0235E BK7 25.4 mm 3.1 mm 3.7 mm -129.7 mm -250 mm 19 $ 4 - 5 days
112-0239E BK7 25.4 mm 3.1 mm 3.6 mm -155.6 mm -300 mm 19 $ 4 - 5 days
112-0243E BK7 25.4 mm 3.6 mm 4 mm -207.5 mm -400 mm 19 $ 4 - 5 days
112-0245E BK7 25.4 mm 3.6 mm 3.9 mm -233.4 mm -450 mm 19 $ 4 - 5 days
112-0247E BK7 25.4 mm 3.7 mm 4 mm -259.4 mm -500 mm 19 $ 4 - 5 days
112-0250E BK7 25.4 mm 3.7 mm 3.9 mm -337.2 mm -650 mm 19 $ 4 - 5 days
112-0252E BK7 25.4 mm 3.8 mm 4 mm -389.0 mm -750 mm 19 $ 4 - 5 days
112-0259E BK7 25.4 mm 3.8 mm 4 mm -518.7 mm -1000 mm 19 $ 4 - 5 days
112-0260E BK7 25.4 mm 3.9 mm 4 mm -778.1 mm -1500 mm 19 $ 4 - 5 days
112-0261E BK7 25.4 mm 3.9 mm 4 mm -1037.4 mm -2000 mm 19 $ 4 - 5 days
112-0263E BK7 25.4 mm 3.9 mm 4 mm -1556.2 mm -3000 mm 19 $ 4 - 5 days
112-0265E BK7 25.4 mm 3.9 mm 3.9 mm -2593.6 mm -5000 mm 19 $ 4 - 5 days
BK7, Size: dia 38.1 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-0409E BK7 38.1 mm 2 mm 5.5 mm -51.9 mm -100 mm 31 $ Request
112-0411E BK7 38.1 mm 3.3 mm 5.6 mm -77.8 mm -150 mm 31 $ Request
112-0415E BK7 38.1 mm 4.1 mm 5.8 mm -103.7 mm -200 mm 31 $ 4 - 5 days
112-0419E BK7 38.1 mm 4.7 mm 5.8 mm -155.6 mm -300 mm 31 $ 4 - 5 days
UVFS, Size: dia 12.7 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-1105E UVFS 12.7 mm 1.3 mm 3 mm -11.9 mm -25 mm 52 $ 4 - 5 days
112-1109E UVFS 12.7 mm 2.2 mm 3 mm -23.8 mm -50 mm 52 $ 4 - 5 days
112-1110E UVFS 12.7 mm 2.4 mm 3 mm -28.5 mm -60 mm 52 $ 4 - 5 days
112-1111E UVFS 12.7 mm 2.5 mm 3 mm -35.7 mm -75 mm 51 $ 4 - 5 days
112-1112E UVFS 12.7 mm 2.6 mm 3 mm -38.0 mm -80 mm 51 $ 4 - 5 days
112-1114E UVFS 12.7 mm 2.6 mm 3 mm -42.8 mm -90 mm 51 $ 4 - 5 days
112-1115E UVFS 12.7 mm 2.7 mm 3 mm -47.6 mm -100 mm 51 $ 4 - 5 days
112-1117E UVFS 12.7 mm 2.7 mm 3 mm -59.4 mm -125 mm 51 $ 4 - 5 days
112-1119E UVFS 12.7 mm 2.7 mm 3 mm -71.3 mm -150 mm 51 $ 4 - 5 days
112-1121E UVFS 12.7 mm 2.8 mm 3 mm -83.2 mm -175 mm 51 $ 4 - 5 days
112-1123E UVFS 12.7 mm 2.8 mm 3 mm -95.1 mm -200 mm 51 $ 4 - 5 days
112-1127E UVFS 12.7 mm 2.8 mm 3 mm -118.9 mm -250 mm 51 $ 4 - 5 days
UVFS, Size: dia 25.4 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-1203E UVFS 25.4 mm 1.6 mm 9 mm -14.3 m -30 mm 83 $ Request
112-1205E UVFS 25.4 mm 1.9 mm 5.5 mm -23.8 mm -50 mm 77 $ 4 - 5 days
112-1209E UVFS 25.4 mm 3.1 mm 5.3 mm -35.7 mm -75 mm 77 $ 4 - 5 days
112-1211E UVFS 25.4 mm 3 mm 4.7 mm -47.6 mm -100 mm 77 $ 4 - 5 days
112-1215E UVFS 25.4 mm 3 mm 4.4 mm -59.4 mm -125 mm 77 $ 4 - 5 days
112-1217E UVFS 25.4 mm 3.1 mm 4.2 mm -71.3 mm -150 mm 72 $ 4 - 5 days
112-1219E UVFS 25.4 mm 3.1 mm 4 mm -95.1 mm -200 mm 72 $ 4 - 5 days
112-1221E UVFS 25.4 mm 3.3 mm 4 mm -118.9 mm -250 mm 72 $ 4 - 5 days
112-1223E UVFS 25.4 mm 3.4 mm 4 mm -142.7 mm -300 mm 72 $ 4 - 5 days
112-1227E UVFS 25.4 mm 3.6 mm 4 mm -190.2 mm -400 mm 66 $ 4 - 5 days
112-1233E UVFS 25.4 mm 3.7 mm 4 mm -237.8 mm -500 mm 66 $ 4 - 5 days
112-1239E UVFS 25.4 mm 3.8 mm 4 mm -356.6 mm -750 mm 66 $ Request
112-1245E UVFS 25.4 mm 3.8 mm 4 mm -475.5 mm -1000 mm 66 $ 4 - 5 days
112-1255E UVFS 25.4 mm 2 mm 4 mm -2377.5 mm -5000 mm 66 $ 4 - 5 days
UVFS, Size: dia 38.1 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-1411E UVFS 38.1 mm 2.4 mm 6.4 mm -47.6 mm -100 mm 121 $ 4 - 5 days
112-1415E UVFS 38.1 mm 3 mm 5.5 mm -71.3 mm -150 mm 121 $ Request
112-1419E UVFS 38.1 mm 3 mm 4.9 mm -95.1 mm -200 mm 121 $ 4 - 5 days
112-1427E UVFS 38.1 mm 4.3 mm 5.6 mm -142.7 mm -300 mm 121 $ 4 - 5 days
UVFS, Size: dia 50.8 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-1509E UVFS 50.8 mm 5 mm 11.9 mm -47.6 mm -100 mm 152 $ 4 - 5 days
112-1517E UVFS 50.8 mm 3.1 mm 5.7 mm -118.9 mm -250 mm 152 $ 4 - 5 days
112-1527E UVFS 50.8 mm 4.7 mm 6 mm -237.8 mm -500 mm 152 $ 4 - 5 days
112-1540E UVFS 50.8 mm 5.8 mm 6 mm -951.0 mm -2000 mm 152 $ Request
CaF2, Size: dia 12.7 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-5105E CaF2 12.7 mm 1.9 mm 4 mm -10.5 mm -25 mm 77 $ 4 - 5 days
112-5109E CaF2 12.7 mm 2 mm 3 mm -20.9 mm -50 mm 77 $ 4 - 5 days
112-5111E CaF2 12.7 mm 2.4 mm 3 mm -31.4 mm -75 mm 77 $ 4 - 5 days
112-5115E CaF2 12.7 mm 2.5 mm 3 mm -41.8 mm -100 mm 77 $ 4 - 5 days
112-5120E CaF2 12.7 mm 2.7 mm 3 mm -62.7 mm -150 mm 77 $ Request
112-5125E CaF2 12.7 mm 1.8 mm 2 mm -83.6 mm -200 mm 77 $ Request
112-5130E CaF2 12.7 mm 1.8 mm 2 mm -104.6 mm -250 mm 77 $ Request
112-5135E CaF2 12.7 mm 1.9 mm 2 mm -209.1 mm -500 mm 77 $ Request
CaF2, Size: dia 25.4 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-5204E CaF2 25.4 mm 2.5 mm 7.8 mm -16.7 mm -40 mm 83 $ 4 - 5 days
112-5205E CaF2 25.4 mm 2.7 mm 7 mm -20.9 mm -50 mm 83 $ 4 - 5 days
112-5209E CaF2 25.4 mm 2.8 mm 5.5 mm -31.4 mm -75 mm 83 $ 4 - 5 days
112-5211E CaF2 25.4 mm 3 mm 5 mm -41.8 mm -100 mm 83 $ 4 - 5 days
112-5217E CaF2 25.4 mm 2.7 mm 4 mm -62.7 mm -150 mm 83 $ 4 - 5 days
112-5219E CaF2 25.4 mm 3 mm 4 mm -83.6 mm -200 mm 83 $ 4 - 5 days
112-5223E CaF2 25.4 mm 3.2 mm 4 mm -104.6 mm -250 mm 83 $ 4 - 5 days
112-5225E CaF2 25.4 mm 3.4 mm 4 mm -125.5 mm -300 mm 83 $ Request
112-5228E CaF2 25.4 mm 3.5 mm 4 mm -167.3 mm -400 mm 83 $ Request
112-5230E CaF2 25.4 mm 2.6 mm 3 mm -209.1 mm -500 mm 83 $ 4 - 5 days
112-5235E CaF2 25.4 mm 2.8 mm 3 mm -418.2 mm -1000 mm 83 $ 4 - 5 days
CaF2, Size: dia 50.8 mm
Code Material Diameter CT ET ROC Focal Length Price Delivery Add to cart
112-5519E CaF2 50.8 mm 3.6 mm 7.2 mm -83.6 mm -200 mm 198 $ Request
112-5525E CaF2 50.8 mm 3 mm 5.6 mm -125.5 mm -300 mm 198 $ Request
112-5530E CaF2 50.8 mm 4 mm 5.5 mm -209.1 mm -500 mm 198 $ Request
 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 ±0.5 mm
Surface irregularity λ/8 @ 633 nm
Surface irregularity for CaF2 λ/4 @ 546 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.