Calcium Fluoride Plano-Concave Lenses — GLH53 Series

From $115 USD

Product description

Calcium fluoride (CaF₂) 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; IR1 antireflection coating; average reflectance <1.5% over 3–5μm.

Plano-concave lens geometry diagram for GLH53 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.

Calcium fluoride transmits from 180 nm to 8.0 μm and offers low fluorescence and high homogeneity. Its relatively soft surface requires careful handling to avoid scratches.

General specifications

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

Material: Calcium fluoride (CaF₂) single crystal

Design wavelength: 587.6nm

RoHS: Compliant with RoHS requirements

Surface quality: 60-40

Diameter tolerance: +0.0/-0.1mm

Center thickness tolerance: ±0.1mm

Focal length tolerance: ±1%

Centration error: <3 arcmin

Clear aperture: >90% of diameter

Edge bevel: 0.2mm×45°

Available specifications

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

14 models

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

										Quote
GLH53-012-018	Calcium fluoride (CaF₂) single crystal	12.7	-18	2	5.3	-19.4	-7.8	Uncoated	$122	Quantity for GLH53-012-018

GLH53-012-025	Calcium fluoride (CaF₂) single crystal	12.7	-25	2.5	4.6	-26.7	-10.8	Uncoated	$115	Quantity for GLH53-012-025

GLH53-025-040	Calcium fluoride (CaF₂) single crystal	25.4	-40	2	7.5	-41.4	-17.4	Uncoated	$157	Quantity for GLH53-025-040

GLH53-025-075	Calcium fluoride (CaF₂) single crystal	25.4	-75	2.5	5.1	-76.7	-32.5	Uncoated	$157	Quantity for GLH53-025-075

GLH53-025-100	Calcium fluoride (CaF₂) single crystal	25.4	-100	3	4.9	-102.1	-43.4	Uncoated	$157	Quantity for GLH53-025-100

GLH53-025-200	Calcium fluoride (CaF₂) single crystal	25.4	-200	3.5	4.4	-202.4	-86.8	Uncoated	$157	Quantity for GLH53-025-200

GLH53-025-500	Calcium fluoride (CaF₂) single crystal	25.4	-500	4	4.4	-502.8	-216.9	Uncoated	$157	Quantity for GLH53-025-500

GLH53-012-018-IR1	Calcium fluoride (CaF₂) single crystal	12.7	-18	2	5.3	-19.4	-7.8	IR1 antireflection coating; average reflectance <1.5% over 3–5μm	$133	Quantity for GLH53-012-018-IR1

GLH53-012-025-IR1	Calcium fluoride (CaF₂) single crystal	12.7	-25	2.5	4.6	-26.7	-10.8	IR1 antireflection coating; average reflectance <1.5% over 3–5μm	$125	Quantity for GLH53-012-025-IR1

GLH53-025-040-IR1	Calcium fluoride (CaF₂) single crystal	25.4	-40	2	7.5	-41.4	-17.4	IR1 antireflection coating; average reflectance <1.5% over 3–5μm	$172	Quantity for GLH53-025-040-IR1

GLH53-025-075-IR1	Calcium fluoride (CaF₂) single crystal	25.4	-75	2.5	5.1	-76.7	-32.5	IR1 antireflection coating; average reflectance <1.5% over 3–5μm	$172	Quantity for GLH53-025-075-IR1

GLH53-025-100-IR1	Calcium fluoride (CaF₂) single crystal	25.4	-100	3	4.9	-102.1	-43.4	IR1 antireflection coating; average reflectance <1.5% over 3–5μm	$172	Quantity for GLH53-025-100-IR1

GLH53-025-200-IR1	Calcium fluoride (CaF₂) single crystal	25.4	-200	3.5	4.4	-202.4	-86.8	IR1 antireflection coating; average reflectance <1.5% over 3–5μm	$172	Quantity for GLH53-025-200-IR1

GLH53-025-500-IR1	Calcium fluoride (CaF₂) single crystal	25.4	-500	4	4.4	-502.8	-216.9	IR1 antireflection coating; average reflectance <1.5% over 3–5μm	$172	Quantity for GLH53-025-500-IR1

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

Choose models and quantities above. Your list is saved in this browser and can include models from other product categories.