Material Properties

Melles Griot Optical Materials

Melles Griot simple lenses are made of synthetic fused silica, BK7 grade A fine annealed glass, and several other materials. The following table identifies the materials used in Melles Griot lenses. Some of these materials are also used in prisms, mirror substrates, and other products. Glass type designations and physical constants are the same as those published by Schott Glass. Melles Griot occasionally uses corresponding glasses made by other glass manufacturers but only when this does not result in a significant change in optical properties.

Five Schott Glass Types  Synthetic Fused Silica  Optical Crown Glass  Low-Expansion Borosilicate Glass  Sapphire  ZERODUR®  Calcium Fluoride

The quality of performance of optical lenses and prisms depends on the quality of the material used. No amount of skill during manufacture can eradicate striae, bubbles, inclusions, or variations in index. Melles Griot takes considerable care in its material selection, using only first-class optical materials from reputable glass manufacturers. The result is reliable, repeatable, consistent performance. The physical constant values given in the links to the specific materials are reasonable averages based on historical experience. Individual material specimens may deviate from these means. Materials having tolerances more restrictive than those published in this optics guide, or materials traceable to specific manufacturers, are available only on special request.

Melles Griot Lens Materials Materials Lens Product Numbers Synthetic Fused Silica, UV Grade 01 LQC 01 LQD 01 LQP 01 LQS Synthetic Fused Silica, Optical Quality 01 LQB 01 LQF Selected 01 CMP Series 01 LQT BK7, Grade A Fine Annealed 01 LCN 01 LCP 01 LDK 01 LDX 01 LFS 01 LMN 01 LMP 01 LPK 01 LPX LaSFN9, Grade A Fine Annealed 01 LPX 401 01 LPX 405 01 LPX 407 01 LPX 411 01 LPX 413 006 LMS BaK1, Grade A Fine Annealed 01 LPX 415 01 LPX 421 01 LPX 423 Optical Crown 01 LAG Low-Expansion Borosilicate Glass (LEBG) Selected 01 CMP series SF11, Grade A Fine Annealed 06 LXP SK11 and SF5, Grade A fine Annealed 06 LAI Sapphire 01 LSX Various Glass Combinations 01 LAL 01 LAO 01 LAT 01 LBX 04 ECW 04 EHY 04 EPP 04 ERA 001 04 EWA 04 EWP 001 04 EWR 001 04 OAS 04 OAP 06 DDL 06 DBF 06 GLC 06 GLR 09 LBM 09 LCM 09 LSL F2 Various multielement lenses Calcium Fluoride Custom Optics

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Optics Guide Copyright 2002 Melles Griot Inc.