Silicon Plano-Convex Lenses — GLH81 Series
From $188 USD
Request a quoteProduct description
GLH81 plano-convex lenses have one flat surface and one convex surface, with a positive focal length. They focus collimated light, collimate point sources and reduce beam divergence.
Single-crystal silicon is used for infrared optical components. The source lists a material transmission range of 1.2–8 μm, high thermal conductivity and a design wavelength of 4 μm.
To reduce spherical aberration when focusing a collimated beam, orient the curved surface toward the incoming light. When collimating a point source, orient the flat surface toward the source.
Schematic
Dimensions in mm unless otherwise stated.
Options include uncoated and IR1 antireflection coating for 3–5 μm; the source specifies average reflectance below 1.5%.
Antireflection coatings reduce surface reflection and help suppress ghost reflections. Choose the wavelength range specified for the individual model.
Select a mount appropriate to the lens diameter and curvature. Compatible thread sizes described in the source include SM05 (0.535″-40), SM1 (1.035″-40) and SM2 (2.035″-40). Mounts and other components are separate from the lens.
The schematic is for reference only and must not be used as a manufacturing drawing. Refer to the individual model specifications and drawing for engineering decisions.
General specifications
GLH81 series specifications; individual model specifications take precedence.
- Material
- Single-crystal silicon (Si)
- RoHS (supplier specification)
- Compliant, as stated by supplier
- Design wavelength
- 4μm
- Surface quality (scratch-dig)
- 60-40
- Diameter tolerance
- +0.0/-0.1mm
- Center thickness tolerance
- ±0.1mm
- Focal length tolerance
- ±1%
- Centration
- <3 arcmin
- Clear aperture
- >90% of diameter
- Chamfer
- Protective chamfer 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.
26 models
Choose comparison fields
Compare up to four fields. Expand a model to read every specification.
Dia. = diameter; CT = center thickness; ET = edge thickness; BFL = back focal length. Units remain shown in each heading.
| Details | Quote | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| GLH81-076-100-IR1 | Single-crystal silicon (Si) | 76.2 | 100 | 29.5 | 4 | — | 41.23 | IR1 coating: 3–5μm | $1,223 | ||
| GLH81-050-075-IR1 | Single-crystal silicon (Si) | 50.8 | 50 | 16.3 | 3 | — | 30.93 | IR1 coating: 3–5μm | $778 | ||
| GLH81-012-015 | Single-crystal silicon (Si) | 12.7 | 15 | 2.6 | 2 | 14.3 | 36.4 | Uncoated | $188 | ||
| GLH81-012-020 | Single-crystal silicon (Si) | 12.7 | 20 | 2.4 | 2 | 19.3 | 48.5 | Uncoated | $188 | ||
| GLH81-012-040 | Single-crystal silicon (Si) | 12.7 | 40 | 2.2 | 2 | 39.4 | 97 | Uncoated | $188 | ||
| GLH81-025-025 | Single-crystal silicon (Si) | 25.4 | 25.4 | 3.3 | 2 | 24.4 | 61.6 | Uncoated | $217 | ||
| GLH81-025-050 | Single-crystal silicon (Si) | 25.4 | 50 | 4 | 3.3 | 48.8 | 121.3 | Uncoated | $217 | ||
| GLH81-025-075 | Single-crystal silicon (Si) | 25.4 | 75 | 4 | 3.6 | 73.8 | 181.9 | Uncoated | $217 | ||
| GLH81-025-100 | Single-crystal silicon (Si) | 25.4 | 100 | 4 | 3.7 | 98.8 | 242.5 | Uncoated | $217 | ||
| GLH81-025-150 | Single-crystal silicon (Si) | 25.4 | 150 | 4 | 3.8 | 148.7 | 363.8 | Uncoated | $217 | ||
| GLH81-025-200 | Single-crystal silicon (Si) | 25.4 | 200 | 4 | 3.8 | 198.7 | 485.1 | Uncoated | $217 | ||
| GLH81-025-500 | Single-crystal silicon (Si) | 25.4 | 500 | 2.1 | 2 | 499.4 | 1212.7 | Uncoated | $217 | ||
| GLH81-025-750 | Single-crystal silicon (Si) | 25.4 | 750 | 2 | 2 | 749.4 | 1819 | Uncoated | $217 | ||
| GLH81-025-1000 | Single-crystal silicon (Si) | 25.4 | 1000 | 2 | 2 | 999.4 | 2425.3 | Uncoated | $217 | ||
| GLH81-012-015-IR1 | Single-crystal silicon (Si) | 12.7 | 15 | 2.6 | 2 | 14.3 | 36.4 | IR1 AR coating: Ravg<1.5% @3–5μm | $275 | ||
| GLH81-012-020-IR1 | Single-crystal silicon (Si) | 12.7 | 20 | 2.4 | 2 | 19.3 | 48.5 | IR1 AR coating: Ravg<1.5% @3–5μm | $275 | ||
| GLH81-012-040-IR1 | Single-crystal silicon (Si) | 12.7 | 40 | 2.2 | 2 | 39.4 | 97 | IR1 AR coating: Ravg<1.5% @3–5μm | $275 | ||
| GLH81-025-025-IR1 | Single-crystal silicon (Si) | 25.4 | 25.4 | 3.3 | 2 | 24.4 | 61.6 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
| GLH81-025-050-IR1 | Single-crystal silicon (Si) | 25.4 | 50 | 4 | 3.3 | 48.8 | 121.3 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
| GLH81-025-075-IR1 | Single-crystal silicon (Si) | 25.4 | 75 | 4 | 3.6 | 73.8 | 181.9 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
| GLH81-025-100-IR1 | Single-crystal silicon (Si) | 25.4 | 100 | 4 | 3.7 | 98.8 | 242.5 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
| GLH81-025-150-IR1 | Single-crystal silicon (Si) | 25.4 | 150 | 4 | 3.8 | 148.7 | 363.8 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
| GLH81-025-200-IR1 | Single-crystal silicon (Si) | 25.4 | 200 | 4 | 3.8 | 198.7 | 485.1 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
| GLH81-025-500-IR1 | Single-crystal silicon (Si) | 25.4 | 500 | 2.1 | 2 | 499.4 | 1212.7 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
| GLH81-025-750-IR1 | Single-crystal silicon (Si) | 25.4 | 750 | 2 | 2 | 749.4 | 1819 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
| GLH81-025-1000-IR1 | Single-crystal silicon (Si) | 25.4 | 1000 | 2 | 2 | 999.4 | 2425.3 | IR1 AR coating: Ravg<1.5% @3–5μm | $333 | ||
No matching models. Change or clear your filters.
Curves
Technical notes
Paraxial thin-lens estimate: f ≈ R / (n − 1), where R is the curved-surface radius and n is the refractive index at the relevant wavelength. Use each model’s listed focal length and back focal length.
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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