Description
A silicon double concave lens is an optical component with two inwardly curved surfaces, primarily used for beam expansion, light divergence, and optical system correction. Made from high-purity silicon, these lenses offer excellent transmission in the infrared spectrum (typically 1.2 µm to 7 µm), making them ideal for applications in thermal imaging, IR spectroscopy, and laser optics.
Silicon's low density and high refractive index (approximately 3.4 at 3 µm) make it a preferred material for lightweight and compact optical designs. Additionally, silicon lenses are often coated with anti-reflective coatings to enhance transmission efficiency and reduce surface reflections.
Optical Silicon Si Biconcave Lens
Specifications
| Material: | Si |
|---|---|
| Diameter: | 12.7 mm |
| Focal Length: | -15 mm |
| Edge Thickness, Te: | 2 mm |
| Lens Type: | Bi-Concave |
| Diameter Tolerance: | +0/-0.1mm |
| Thickness Tolerance: | ±0.1mm |
| Surface Quality: | 60-40 Scratch-dig |
| Surface Accuracy: | 1/4 lambda |
| Coating: | Custom |
| Concentricity: | <3 arcmin |
| Bevel: | <0.35mm |
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Features
- Material: Made of high-purity silicon, providing excellent infrared transmission.
- Optical Properties: High refractive index (~3.4 at 3 µm) enables effective beam divergence.
- Surface Design: Features two inwardly curved surfaces for controlled light dispersion.
- Infrared Compatibility: Performs well in the IR spectrum (1.2 µm - 7 µm), making it ideal for thermal imaging.
- Lightweight: Silicon’s low density allows for compact and lightweight optical system designs.
- Anti-Reflective Coatings: Often coated to minimize surface reflections and enhance transmission.
Applications
- Laser Optics: Used to expand and shape laser beams in optical setups.
- Infrared Imaging: Essential for thermal imaging systems in security and medical applications.
- Spectroscopy: Applied in IR spectroscopy for precise light control and measurement.
- Optical Corrections: Helps correct optical aberrations in complex optical systems.
- Defense and Aerospace: Utilized in infrared guidance systems and aerospace optical technologies.
Frequently Asked Questions
What are the primary applications of a silicon double concave lens?
Does a silicon double concave lens require a coating?
Can silicon double concave lenses be used in visible light applications?
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