Model:49-4
1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
2. Light transmission: 95% (97% after coating)
3. Refractive index: 1.474
4. Operating temperature: -50-500 degrees
5. Size introduction: External diameter: 49mm, Height: 23.4mm, Steps: 3.5mm
6. Light angle: 70°
Model:50-21
1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
2. Light transmission: 95% (97% after coating)
3. Refractive index: 1.474
4. Operating temperature: -50-500 degrees
5. Size introduction: External: 49.5mm, Internal: 46.2mm, Height: 18.32mm, Steps: 2.5mm
6. Light Angle:60°
Model:50-49
1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
2. Light transmission: 95% (97% after coating)
3. Refractive index: 1.474
4. Operating temperature: -50-500 degrees
5. Size introduction: External diameter: 50mm, Internal: 48.5mm, Height: 28mm, Steps: 4mm
6. Light angle: 40°
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