«KBTEM-OMO»
JOINT STOCK COMPANY
 
Spherical components

Spherical parts (lenses): Plano-convex lenses; Plano-concave lenses; Bi-convex lenses; Bi-concave lenses; Convex-concave (meniscus lenses)

 

 

Material

BK 7, quality optical glass, fused silica

Diameter

3÷500 mm

Center thickness

1÷60 mm

Diameter tolerance

+0/- 0.1 mm

Center thickness tolerance

± 0.1 mm

Surface accuracy

≤ 3 fringes (1.2λ) – local error, 0.3 fringes (λ/8) – at λ=632.8 nm

Surface quality

0.006-mm wide scratches of total length 2x over working aperture

Centration

≤ 3 arc min.

Chamfers

0÷0.6 mm @ 45o±15o, typical

Working aperture

≥ 90% of diameter

Antireflection coating

Single-layer MgF2 broadband, laser line

Working wavelength

210-2100 nm

Focus deviation at λ=632.8 nm

±1%

Cleaning

Non-abrasive method, acetone or isopropyl alcohol on lens tissue are recommended

Damage threshold

AR coating: 100W/cm2 CW, 2 J/cm2 with 10 n/sec pulses