Infrared Optical Windows
Coatings available, AR, High Durability AR, DLC, and Spectral Filters
Materials: Ge, Si, ZnS, Chalcogenides, CaF2 and more
Sizes up to 350mm diameter, and 50 mm thick
Overview
LightPath Technologies, through its subsidiary ISP Optics, has been fabricating infrared windows for over 25 years. Manufactured in our ISO 9001:2015 and ITAR certified facility, LightPath uses multiple polishing techniques including double sided, continuous and pitch polishing. We offer a wide range of sizes, angles and thicknesses in addition to years of experience with a variety of materials. Our optical windows can provide even better performance with Diamond Like Carbon (DLC) or Antireflective (AR) coatings using our in-house CVD and PVD chambers. Every order contains QC documentation utilizing our extensive metrology capabilities.
If you have a need to protection your sensor or laser, please contact us.
Typical Tolerances
| ZnSe, ZnS | CaF2, BaF2, MgF2 | Ge, Si | GaAs | Chalcogenide Glass, CdTe | KRS-5 | NaCl, KBr, KCl | |
|---|---|---|---|---|---|---|---|
| Diameter |
2.5 – 350 mm |
2.5-160 mm |
2.5-350 mm |
2.5-120 mm |
2.5-120 mm |
10-80 mm |
v10-80 mm |
| Thickness |
0.5 – 50 mm |
0.5-50 mm |
0.5-50 mm |
0.5-50 mm |
0.5-75 mm |
1-25 mm |
1-25 mm |
| Scratch/Dig |
20/10 |
20/10 |
20/10 |
40/20 |
60/40 |
60/40 |
60/40 |
| Flatness |
0.25 fr |
0.25 fr |
0.25 fr |
0.25 fr |
1 fr |
8-12 fr |
2 fr |
| Irregularity |
0.25 fr |
0.25 fr |
0.25 fr |
0.25 fr |
0.5 fr |
2-4 fr |
2 fr |
| Power |
0.25 fr |
0.25 fr |
0.25 fr |
0.25 fr |
1 fr |
8-12 fr |
3 fr |
| Roughness |
10A RMS |
10A RMS |
10A RMS |
10A RMS |
15A RMS |
30A RMS |
30A RMS |
| Parallelism |
10 sec |
2 sec |
2 sec |
2 sec |
3 min |
5 min |
2 sec |
| Dimension Tolerances |
+/-0.025 mm |
+/-0.025 mm |
+/-0.025 mm |
+/-0.025 mm |
+/-0.025 mm |
+/-0.05 mm |
+/-0.05 mm |
| Diameter Tolerances |
+/-0.025 mm |
+/-0.025 mm |
+/-0.025 mm |
+/-0.025 mm |
+/-0.025 mm |
+/-0.05 mm |
+/-0.05 mm |
Coatings
Lightpath offers both standard, and custom optical coatings for its infrared windows. Those include Anti Reflective (AR), High Durability AR, Spectral Filters, and protective Diamond Like Carbon (DLC) coatings.
All three of our global facilities are vertically integrated and include in-house coating and testing. For further information about available coatings please visit our coatings page or contact us.
25mm Chalcogenide Window
Germanium (Ge) window coated with 8-12um Anti Reflective Coating
12mm Barium Fluoride (BaF2) Window
12mm Zinc Sulfide (ZnS) Window
12mm Cadmium Telluride (CdTe) Window
Uncoated Germanium Window
BD6 Window side view
IR Brewster Windows
Round Window with Hole
Square Germanium Window
Ge Window
Si Window 1
Si Window 2
Si Window 3
Contact
Mark Palvino
VP Sales