High Precision Infrared Optical Silicon Si Plano Concave Lens for LiDAR & Driver Assistance Systems

Name: High Precision Infrared Optical Silicon Si Plano Concave Lens for LiDAR & Driver Assistance Systems
Brand: Henan UM Optics Ltd
Availability: InStock

Description

Silicon (Si) plano-concave lenses are rugged single-crystal infrared optical components with a flat surface and a concave curved surface. Featuring negative optical power, this infrared lens is professionally designed for beam divergence, optical compression and aberration matching. Made of high-purity monocrystalline silicon, it offers stable transmittance within 1.2μm to15μm mid-infrared band, high refractive index and outstanding mechanical hardness. With excellent thermal conductivity and moisture resistance, silicon plano-concave lenses maintain stable beam divergence performance under harsh environmental conditions, widely adopted for compact infrared optical systems and industrial infrared detection equipment.

Specifications

Material:	Si
Lens Type:	Plano-Concave
Size:	custom
Dimension Tolerance:	+0/-0.1mm
Surface Quality:	60-40,40-20,or better
Surface Flatness:	4/λ

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Features

High Refractive Index: Provides strong focusing ability and compact optical structure for infrared light path design
Excellent Mechanical Hardness: High structural strength and wear resistance to resist physical scratch and damage
Superior Thermal Conductivity: Quickly dissipates heat to avoid thermal deformation during continuous working
Low Thermal Expansion Coefficient: Maintains stable focal length under temperature fluctuation and harsh environment
Dense & Non-hygroscopic: Insensitive to moisture, suitable for complex industrial and outdoor application conditions

Applications

Infrared Thermal Imaging System: Used for infrared focusing and imaging in thermal cameras and night vision devices
Infrared Temperature Measurement Equipment: Applied in industrial pyrometers and non-contact infrared detection instruments
Infrared Spectroscopy: Serves as focusing lens for gas analysis and molecular infrared detection systems
Military & Aerospace Optics: Suitable for infrared observation, tracking and precision optical detection equipment
Protective Optical Assembly: Used as durable infrared focusing elements in harsh industrial environmental systems

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Frequently Asked Questions

What is the core usage advantage of silicon plano-concave lens in infrared assembly?

It provides stable negative focal length for infrared divergence. Its high hardness and non-hygroscopic property make it more durable than ZnSe for long-term outdoor and industrial infrared optical combinations.

Why cannot silicon concave lens be used for 10.6μm CO₂ laser?

Silicon produces strong molecular absorption at 10.6μm wavelength. Excessive heat accumulation will cause lens burn, so it is completely unsuitable for carbon dioxide laser transmission.

How does the high refractive index of silicon affect divergence performance?

The high refractive index achieves larger divergence angle under the same curvature, helping engineers design thinner and lighter infrared lens groups for miniaturized equipment.

Does ambient temperature fluctuation affect its divergence accuracy?

Barely affected. Silicon has low thermal expansion coefficient and fast heat dissipation, maintaining stable curvature and consistent beam divergence accuracy under temperature changes.

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