1 Micron Material Properties

Product catalog summary

Transmissive Materials for 1μm Optics

Specifications:
The document provides a comparison of four transmissive materials used in optics: BK7, Fused Silica, MS ZnS, and ZnSe. Key properties include density, Poisson's ratio, hardness, rupture modulus, Young's modulus, linear expansion coefficient, specific heat, thermal conductivity, scatter coefficient at different wavelengths, index of refraction, and temperature change of refractive index.

Mechanical Properties:
The materials are compared based on their density, Poisson's ratio, hardness, rupture modulus, and Young's modulus. For instance, ZnSe has the highest density (5.27 g/cm³) and a Poisson's ratio of 0.28.

Thermal Properties:
The document outlines the linear expansion coefficient, specific heat, and thermal conductivity of each material. Fused Silica has the lowest linear expansion coefficient (0.55 x10^-6/°C) and specific heat (0.703 J/g/°C).

Optical Properties:
The scatter coefficient, index of refraction, and bulk absorption are detailed. ZnSe has the highest index of refraction at 1.06 µm (2.483) and a temperature change of refractive index of 70 x10^-6/°C.

Lens K-Values:
K-values for different lens types (Plano/Convex, Positive Meniscus, Equi-Convex) are provided to estimate focus spot size with spherical aberrations. ZnSe has the lowest K-value for Positive Meniscus lenses (0.01758).

Equations:
Two equations are provided to estimate spot size: the Diffraction Limited Equation and the Aberration Limited Equation, which consider factors like wavelength, mode quality factor, beam diameter, focal length, and aberration coefficient.

Material Notes:
Zinc sulfide MultiSpectral (ZnS MS) is highlighted as the only material suitable for NIR and IR freeform optics.

Contact Information:
The document lists worldwide sales offices for II-VI Infrared, including locations in China, Singapore, Japan, the UK, Switzerland, Belgium, the USA, and Germany, with contact details for each.

Catalog excerpts

Transmissive Materials for 1μm Optics BK7 2.51 Poisson's Ratio Specific Heat (J/g/°C) Thermal Conductivity (W/cm/°C) Plano/Convex Lens Positive Meniscus Lens Equi-Convex Lens Optical Properties Thermal Properties Mechanical Properties Fused Silica Hardness (Knoop) Linear Expansion Coef (x10^-6/°C) Index of Refraction @ 1.06 µm Temp. Change of Refractive Index(x10^-6/°C) @ 1.06 µm Bulk Absorption (/cm) @ 1.07 µm K-Values For Lenses, Zinc sulfide MultiSpectral (ZnS MS) is the only material for NIR and IR freeform optics. Notes: 1) ND means not detectable. 2) K values are used to estimate focus spot size of lenses with spherical aberrations. Below are two equations used to estimate spot size. The equation on the left assumes a perfect lens such as an aspheric lens. The equation on the right assumes the lens has some spherical aberration. Diffraction Limited Equation diffraction limited focused beam diameter aberration limited focused beam diameter wavelength of light mode quality factor for the laser beam Aberration Limited Equation ≡ beam diameter at the e-2 power points ≡ is the focal length of the lens ≡ is the aberration coefficient .

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...the world leader in CO 2 laser optics WORLDWIDE SALES OFFICES To place an order, contact a II-VI sales representative at any of the following locations, or log onto www.iiviinfrared.com/contact for our most complete and up-to-date information. II-VI INFRARED II-VI WEST 375 saxonburg blvd saxonburg, pa 16056 UNITED STATES 36570 Briggs Road Murrieta, CA 92563 UNITED STATES BAAIKENSSTRAAT 21/2 B-9240 ZELE BELGIUM 888.558.1504 (toll-free in USA) 724.352.1504 (phone) 724.352.4980 (fax) [email protected] (e-mail) 800.262.5273 (toll-free in USA) 951.926.7640 (phone) 951.926.1984 (fax) [email protected]...

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