These precision research grade optics are available for immediate delivery.  Both Plano-Plano and Plano-Concave substrates have 'Ultra-Smooth' (< 1 Å rms) primary surfaces (S1) and are figure to better than 1/10 Wave PV. 

They are perfect for use in any number of low scatter applications.  Combine them with our low scatter, low absorption, low loss coatings and you'll definitely have a winning combination!  Performance gains are almost guaranteed!

Developing your own coatings?  Eliminate the substrate as the primary cause of failure.  These substrates with their exacting surfaces make for the ideal witness sample.  Give them a try now!
 

Side 1 Optical Specifications:

• Clear Aperture = Central 80%

• Surface Figure <= 1/10 Wave PV

• Surface Roughness <= 1 Å rms (1,2)

• Surface Quality <= 10-5 Scratch-Dig

(1) as measured on our Zygo Heterodyne Profiler, Model 5500
(2) <= 2 Å on some Silicon Carbides

Side 2 Optical Specifications:

• Clear Aperture = Central 50%

• Surface Figure <= 1/5 Wave PV (2)

• Surface Roughness <= 5 Å rms (1,2)

• Surface Quality <= 40-20 Scratch-Dig (2)

(1) as measured on our Zygo Heterodyne Profiler, Model 5500
(2) n/a on some substrates (i.e. lapped finishes)

Dimensions

• Diameter = 'd' ± .010"

• Thickness = 't' ± .020"

• Radius = 'r' (tolerances vary)

• Surface Parallel <= 1 Arc Minute

• Chamfers = .030" ± .020" x 45°

Materials:

• Zerodur^®

• Fused Silica

• ULE

• BK-7 FA

• Sapphire

• Silicon

• Silicon Carbide

Concave-Plano Substrates