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These are precision grade mirrors but not as expensive as the λ/10 versions. Used in many scientific instruments where quality is important but the use of the λ/10 versions cannot be justified.

We stock ¼ wave plane mirrors in a wide range of coatings to meet most applications:

  • Enhanced aluminium 94%R for visible applications.
  • 99.9% dielectric for laser use in visible applications.
  • UV aluminium for UV applications down to 180nm.
  • 98.5% dielectric for laser use in the NIR applications.
  • Ion plated silver for NIR-2000nm applications.
  • Protected gold for 750nm to far infra-red applications.

Standard sizes can be purchased directly from this site. Knight Optical also offer an extensive custom optic service and can cut and shape precision mirrors to fit our customer's requirements. For more information on custom mirror, or to place an order, please contact our technical sales team.

Material:
Diameter:
Length/Width:
Thickness:
Surface Quality:
Flatness:
Parallelism:
Coating:
Soda lime float glass, BK7 or equivalent
+0/-0.2 mm
±0.1mm
+0.1/-0.3mm
<40:20 scratch/dig
λ/4 over 90% of mirror dimension
<30 arcsec

Edging of stock mirrors to smaller diameters.
Stock mirrors can be machined to custom square or rectangular apertures or bespoke designs.
Various mounting options.

41 Items

Name Wavelength range (nm) Coating Diameter (mm) Length (mm) Width (mm) Thickness (mm) Price Buy
MZM7575 180-650 Ali/MgF² (85% UV) 75 75 8
$180.63
MZM7555 180-650 Ali/MgF² (85% UV) 75 8
$180.63
MZM5066 180-650 Ali/MgF² (85% UV) 50 6
$97.23
MZM5050 180-650 Ali/MgF² (85% UV) 50 50 8
$97.23
MZM4040 180-650 Ali/MgF² (85% UV) 40 40 6
$75.69
MZM4033 180-650 Ali/MgF² (85% UV) 40 6
$75.69
MZM2533 180-650 Ali/MgF² (85% UV) 25 4
$50.67
MZM1522 180-650 Ali/MgF² (85% UV) 15 3
$41.63
MQG7575 750-FAR IR Gold (97%@750-FAR IR) 75 75 8
$208.43
MQG7555 750-FAR IR Gold (97%@750-FAR IR) 75 8
$208.43
MQG5066 750-FAR IR Gold (97%@750-FAR IR) 50 6
$111.13
MQG5050 750-FAR IR Gold (97%@750-FAR IR) 50 50 8
$111.13
MQG4040 750-FAR IR Gold (97%@750-FAR IR) 40 40 6
$83.33
MQG4033 750-FAR IR Gold (97%@750-FAR IR) 40 6
$83.33
MQG2533 750-FAR IR Gold (97%@750-FAR IR) 25 4
$64.57
MQG1622 750-FAR IR Gold (97%@750-FAR IR) 15 3
$55.53
MQE2533 450-650 Enh/Ali (94% visible) 25 6
$47.89
MQE1522 450-650 Enh/Ali (94% visible) 15 3
$40.94
MQE1507 450-650 Enh/Ali (94% visible) 15 10 3
$52.06
MQE1502 450-650 Enh/Ali (94% visible) 15 15 3
$52.06
MQE1022 450-650 Enh/Ali (94% visible) 10 3
$36.07
MQE10077 450-650 Enh/Ali (94% visible) 100 15
$242.49
MQE1002 450-650 Enh/Ali (94% visible) 10 10 3
$49.28
MQD7575 450-700 Dielectric (99% visible) 75 75 8
$229.28
MQD7555 450-700 Dielectric (99% visible) 75 8
$229.28
MQD5050 450-700 Dielectric (99% visible) 50 50 8
$173.68
MQD5033 450-700 Dielectric (99% visible) 50 6
$173.68
MQD4040 450-700 Dielectric (99% visible) 40 40 6
$145.19
MQD4033 450-700 Dielectric (99% visible) 40 6
$145.19
MQD2533 450-700 Dielectric (99% visible) 25 4
$83.33
MQD2503 450-700 Dielectric (99% visible) 25 25 6
$97.23
MQD1522 450-700 Dielectric (99% visible) 15 3
$69.43
MQD1503 450-700 Dielectric (99% visible) 25 15 6
$89.59
MGI7575 700-1064 Dielectric (98% NIR) 75 75 8
$270.29
MGI7555 700-1064 Dielectric (98% NIR) 75 8
$270.29
MGI5050 700-1064 Dielectric (98% NIR) 50 50 8
$201.48
MGI5033 700-1064 Dielectric (98% NIR) 50 6
$201.48
MGI4040 700-1064 Dielectric (98% NIR) 40 40 6
$166.73
MGI4033 700-1064 Dielectric (98% NIR) 40 6
$166.73
MGI2533 700-1064 Dielectric (98% NIR) 25 4
$97.23
MGI1522 700-1064 Dielectric (98% NIR) 15 3
$83.33

41 Items

1

1⁄4λ Mirrors

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