Zinc Selenide Plano-Concave Lenses — GLH73 Series

From $366 USD

Product description

Zinc selenide (ZnSe) plano-concave lenses have one flat and one concave surface and a negative focal length. They turn collimated incident light into a diverging beam with a virtual focus and are commonly used in Galilean beam expanders. Orient the concave surface toward the incident beam, with the plane surface toward the focal plane.

Plano-concave lenses provide negative spherical aberration and can compensate aberrations from other lenses in an optical system. For source-recommended conjugate magnitudes below 0.2 or above 5, plano-concave lenses are generally selected; double-concave lenses are often used between these values.

Available coatings: Uncoated; IR2 antireflection coating; average reflectance <1.5% over 8–12μm.

Plano-concave lens geometry diagram for GLH73 series — Schematic
Dimensions in mm unless otherwise stated.

Antireflection coatings reduce surface reflections and ghost images. An uncoated glass surface reflects approximately 4% of incident light; coatings on both surfaces improve transmission in multi-element systems.

ZnSe is used in infrared and thermal imaging systems with a source-stated transmission range of 600 nm to 16 μm. Handle with gloves, avoid direct contact, and wash hands thoroughly afterward; its low hardness requires extra care.

General specifications

General specifications apply at series level; refer to each model for its dimensions, material and coating.

Material: CVD laser-grade zinc selenide (ZnSe)

Design wavelength: 10.6μm

Diameter tolerance: +0.0/-0.1mm

Center thickness tolerance: ±0.2mm

Focal length tolerance: ±1%

Centration error: <3 arcmin

Surface quality: 60-40

Edge bevel: 0.2mm×45°

Handling note: Use gloves, avoid direct contact, and wash hands after handling.

Available specifications

USD unit prices. Shipping, taxes and dispatch timing are confirmed with your quotation. Select models and quantities to build your quote list.

10 models

Dia. = diameter; CT = center thickness; ET = edge thickness; BFL = back focal length. Units remain shown in each heading.

										Quote
GLH73-025-025	CVD laser-grade zinc selenide (ZnSe)	25.4	-25.4	2	4.3	-26.2	-35.6	Uncoated	$366	Quantity for GLH73-025-025

GLH73-025-050	CVD laser-grade zinc selenide (ZnSe)	25.4	-50	2	3.2	-50.8	-70.1	Uncoated	$366	Quantity for GLH73-025-050

GLH73-025-075	CVD laser-grade zinc selenide (ZnSe)	25.4	-75	2	2.8	-75.8	-105.2	Uncoated	$366	Quantity for GLH73-025-075

GLH73-025-100	CVD laser-grade zinc selenide (ZnSe)	25.4	-100	2	2.6	-100	-140.3	Uncoated	$366	Quantity for GLH73-025-100

GLH73-025-200	CVD laser-grade zinc selenide (ZnSe)	25.4	-200	2	2.3	-200	-280.5	Uncoated	$366	Quantity for GLH73-025-200

GLH73-025-025-IR2	CVD laser-grade zinc selenide (ZnSe)	25.4	-25.4	2	4.3	-26.2	-35.6	IR2 antireflection coating; average reflectance <1.5% over 8–12μm	$420	Quantity for GLH73-025-025-IR2

GLH73-025-050-IR2	CVD laser-grade zinc selenide (ZnSe)	25.4	-50	2	3.2	-50.8	-70.1	IR2 antireflection coating; average reflectance <1.5% over 8–12μm	$420	Quantity for GLH73-025-050-IR2

GLH73-025-075-IR2	CVD laser-grade zinc selenide (ZnSe)	25.4	-75	2	2.8	-75.8	-105.2	IR2 antireflection coating; average reflectance <1.5% over 8–12μm	$420	Quantity for GLH73-025-075-IR2

GLH73-025-100-IR2	CVD laser-grade zinc selenide (ZnSe)	25.4	-100	2	2.6	-100.8	-140.3	IR2 antireflection coating; average reflectance <1.5% over 8–12μm	$420	Quantity for GLH73-025-100-IR2

GLH73-025-200-IR2	CVD laser-grade zinc selenide (ZnSe)	25.4	-200	2	2.3	-200.8	-280.5	IR2 antireflection coating; average reflectance <1.5% over 8–12μm	$420	Quantity for GLH73-025-200-IR2

Curves

Typical transmission or coating performance. Refer to the model’s coating range.

Technical notes

Review the material, dimensions and other specifications listed for the individual model. Check any available curves against the model's stated operating range.

Illustrations and printable specification summaries are reference information, not manufacturing drawings. Confirm technical suitability and final requirements with your quotation.

Quote list

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