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Chalcogenide glass lens

Chalcogenide glass is a glass composed of sulfur, selenium, tellurium and other elements (arsenic, antimony, germanium, etc.) in addition to oxygen and polonium in the VIA group of elements in the periodic table or their own combination. It has the following good properties:

● Far infrared transmittance is more than 64%(wavelength 8μm ~ 12 μm), after coating the transmittance can reach more than 95%.

● Low Tg, Ts temperature, suitable for aspherical lens precision molding, conducive to reducing the production cost of batch lenses.

● Low refractive index temperature coefficient, is an excellent infrared non-thermal lens design material, can achieve no color difference, no thermal defocusing optical system.
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Chalcogenide glass is a glass composed of sulfur, selenium, tellurium and other elements (arsenic, antimony, germanium, etc.) in addition to oxygen and polonium in the VIA group of elements in the periodic table or their own combination. It has the following good properties:

Far infrared transmittance is more than 64%(wavelength 8μm ~ 12 μm), after coating the transmittance can reach more than 95%.

Low Tg, Ts temperature, suitable for aspherical lens precision molding, conducive to reducing the production cost of batch lenses.

Low refractive index temperature coefficient, is an excellent infrared non-thermal lens design material, can achieve no color difference, no thermal defocusing optical system.


(1)Mid infrared wave band materials - Product parameters

No.

Brand No.

υ4

n4

ρ(g/cm3

Transmittance wavelength
μm)

1

IRG101

12.77

1.5964

3.20

0.35.0

2

IRG102

14.76

1.6226

3.10

0.3~5.0

3

IRG104

13.67

1.6056

3.40

0.3~5.0

4

IRG105

18.92

1.8541

5.62

0.45.0

5

IRG106

21.21

1.7333

4.28

0.46.0


Far infrared wave band materials - Product parameters

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Chalcogenide glass lens or based on clients' requirements


1..Material

Chalcogenide glass

2.Dimensional tolerances

0/-0.05mm

3.Surface flatness

/4@633nm,per 25.4mm diameter

3.Clear aperture

90%

4.Centration

1 arc minute

5.Surface quality

Infrared 40-20

6.Edge Chip

0.1mm

7.Bevel

Based on clients' requests

8.Coating

Apply Infrared AR coating or based on client requests