Plane Parallel Plates

The plates are produced from crown glass BK 7 or fused silica. They are used as windows, Brewster windows or as substrates for beamsplitter coatings in interferometers or other devices. The flatness of the substrate is λ/10 (λ = 550 nm) on both sides and the parallelism is λ/10.

Plane Parallel Plates Material
Diameter Thickness BK 7 Suprasil
Ordernr. Price 1 pc. Price 2-5 pc. Price 6-10 pc. Ordernr. Price 1 pc. Price 2-5 pc. Price 6-10 pc.
  10 mm
  15 mm
  20 mm
  25 mm
  30 mm
  40 mm
  50 mm
  60 mm
  70 mm
  80 mm
  90 mm
100 mm
  2 mm
  2 mm
  3 mm
  4 mm
  4 mm
  5 mm
  7 mm
  8 mm
10 mm
12 mm
15 mm
15 mm
TPB 010
TPB 015
TPB 020
TPB 025
TPB 030
TPB 040
TPB 050
TPB 060
TPB 070
TPB 080
TPB 090
TPB 100
€ 106
€ 197
€ 264
€ 360
€ 405
€ 507
€ 550
€ 679
€ 974
€ 1150
€ 1674
€ 1894
€ 97
€ 180
€ 239
€ 329
€ 370
€ 465
€ 515
€ 626
€ 897
€ 1037
€ 1584
€ 1791
€ 85
€ 160
€ 210
€ 294
€ 331
€ 417
€ 476
€ 565
€ 809
€ 908
€ 1524
€ 1723
TPS 010
TPS 015
TPS 020
TPS 025
TPS 030
TPS 040
TPS 050
TPS 060
TPS 070
TPS 080
TPS 090
TPS 100
€ 113
€ 213
€ 285
€ 382
€ 463
€ 605
€ 650
€ 834
€ 1247
€ 1547
€ 2129
€ 2405
€ 103
€ 194
€ 257
€ 349
€ 424
€ 555
€ 609
€ 769
€ 1148
€ 1396
€ 2014
€ 2276
€ 91
€ 173
€ 226
€ 312
€ 379
€ 497
€ 562
€ 694
€ 1035
€ 1222
€ 1938
€ 2189
The thicknesses are guiding values.

Other sizes and thicknesses → on request

Reflection coatingsto top

  • Reflection and antireflection coatings available → on request

Available on special orderto top

  • Mach-Zehnder Interferometer Set:
    We can provide matched sets of plates for use in Mach-Zehnder Interferometers. These sets consist of two plane parallel plates based on the above or modified specifications (made of optical glasses or fused silica - inclusive of Homosil) and two plane mirrors  → on request
  • Plane parallel plates in rectangular and other shapes  → on request
  • Plane parallel plates with higher accuracy in surface flatness, parallelism and optical thickness → on request
  • Plane parallel plates for use as solid etalons → on request
  • Optical flats with surface wedge angles per customer's specification → on request
  • Plane parallel plates in other types of glass or crystal → on request
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