FL 50mm F1.2 Thermal Sight Lens For 640x512-17um Detector

Infrared multi-layer coating technology (IR Coating), infrared anti-reflection:

The multi-layer composite coating technology can reduce light scattering loss, increase the light transmittance of the lens, and make the picture clearer. 

At the same time, the anti-reflection of light waves with a wavelength of 750-1000nm is improved. 

The surface of the lens is generally dark green. 

Infrared multi-layer coating technology (IR Coating) can improve the near-infrared light transmittance, and can play a icing on the cake effect for the infrared lens to better achieve high-definition.

Thermal Sight Lens Parameters:

Product Name	Infrared Aiming Lens
Focal Length	50mm
F#	1.2
Material	Chalcogenide, ZnSe(Zinc Selenide), ZnS(Zinc Sulfide), Si(Silicon), CaF2(Calcium Fluoride), BaF2(Barium Fluoride), etc.
Image Diagonal	13.93mm
Detector	640x512-17um
Average Transmission	＞94%
Circular FOV	(H)12.4°x(V)9.3°x(D)15.5°
Back Focus Distance	18mm
Back Working Distance	8.5mm
Back Focus Length	19.78mm
Dimensions	56mm / 63.76mm
Focus Type	Manual Focus
Focus Range	1m to infinity
Mount Type	M45x1-6g
Weight	148g
Operating Temperature	-40℃ to +80℃
Storage Temperature	-40℃ to +80℃
External Coating	DLC / AR Coating Available

Infrared Lens Processing Equipment:

1. Inner carving test platform;

2. Microscope;

3. Opto Tech aspheric processing;

4. Polishing machine;

5. Thickness Gauge;

6. Ultrasonic Cleaner;

7. Workshop;

8. Interferometer;

9. High and low tempera ture test chamber;

10. High polishing machine;

11. Optical bench;

12. Raul milling;

13. Atomic force microscope;

14. Centralinstrument;

15. Hand Grinding and Polishing Machine;

FAQ:

What Are DLC And AR Coating?

Diamond-like carbon (DLC) membrane is an amorphous carbon membrane. The membrane contains a certain number of sp3 bonds, giving it a series of excellent properties close to diamond. It has the advantages of low deposition temperature and large area deposition.

Among various hard membranes, DLC membrane can be positioned as a membrane material with high hardness and excellent wear resistance and low coefficient of friction.

AR (Anti-Reflection) membrane cannot change the absorption rate of the lens itself. It can only increase the transmittance by reducing the reflectance on both sides of the lens, which is the so-called "reflection and antireflection".

Light is an electromagnetic wave. By matching the refractive index and thickness of the AR membrane, the light produces multi-beam interference in the AR membrane-destructive interference on the upper surface and constructive interference on the lower surface.