Fabry-Perot Interferometer Plates

These plane plates are produced as mirror substrates for use in Fabry-Perot interferometers. The material is fused silica with a transmission range of 180 or 270 to 2600 nm. The expansion coefficient is 0.5*10-6/K. The plates have a 30' wedge angle to eliminate back side reflections from the path of light. The cylindrical outer surfaces of the plates are polished. The table lists the departures from parallelism of the matched surfaces of the pairs of plates. The back surfaces are plane to λ/10.

Plate Pairs λ/50 λ/100
Diameter Thickness Ordernr. Price 1-2 pairs Price 3-5 pairs Price 6-10 pairs Ordernr. Price 1-2 pairs Price 3-5 pairs Price 6-10 pairs
25 mm
30 mm
40 mm
50 mm
60 mm
70 mm
  6 mm
  8 mm
10 mm
15 mm
15 mm
18 mm
IPL 5.025
IPL 5.030
IPL 5.040
IPL 5.050
IPL 5.060
IPL 5.070
€ 1573
€ 1827
€ 2185
€ 2776
€ 3079
€ 4773
€ 1469
€ 1706
€ 2041
€ 2592
€ 2875
€ 4456
€ 1399
€ 1624
€ 1943
€ 2468
€ 2738
€ 4243


IPL 10.040
IPL 10.050
IPL 10.060
IPL 10.070


€ 3283
€ 4369
€ 5048
€ 5870


€ 3066
€ 4081
€ 4714
€ 5481


€ 2920
€ 3885
€ 4489
€ 5220

Reflection coatingsto top

  • Silver and protective layer for use in the visible and in IR (from 400 nm) with percentage of reflectivity as required. Price per charge IPL 1.700 | € 790
  • Special reflection coatings, e.g., for UV or IR → on request

Available on special orderto top

  • Plate pairs in CaF2, BaF2 and other materials for IR spectroscopy → on request
  • Plate pairs with spherical surfaces → on request
  • Etalons (Solid Fabry-Perot interferometers) → on request
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