Edmund Optics 49-090 Heat ABS Glass KG-3 Shortpass Filter

🔍 Product Overview: Edmund Optics #49‑090 (Schott KG3 Heat‑Absorbing Shortpass Filter)

Key Specifications

• Material & Type: Schott KG3 colored glass – an IR heat‑absorbing, shortpass filter substrate  

• Diameter: 50 mm

• Thickness: 3.00 ± 0.38 mm

• Wavelength Range: Blocks IR from ~300 nm up to around 2700 nm (visible light passes, heat/IR absorbed)

• Refractive Index (nₙₙₙₙ): ~1.51 at the d‑line

• Operating Temperature: Up to ~300 °C

• Surface Quality: 60‑40 scratch/dig; protective beveling

• Uncoated glass – no additional dielectric coatings

Purpose & Applications

• Ideal for infrared cut‑off and heat protection in optical setups: passes visible light while absorbing IR energy from 0.7–2.7 µm.

• Prevents thermal damage to sensors or optics in high‑intensity illumination systems