About EKSMA Optics
* Attenuation range for transmitted beam:
- Typical: 0.1% - 98%
- For 257 nm and 266 nm: 1% - 94%
* Attenuation range for reflected beam:
- Typical: 2% - 99.9%
- For 257 nm and 266 nm: 4% - 99%
* Extinction ratio: >1:1000
* Clear aperture:
- 990-0077 - ⌀17 mm
- 990-0078 - ⌀22 mm
This manual variable attenuator series is designed to continuously attenuate linearly polarized laser beams. They feature precision opto-mechanics and high-LIDT optical components incorporated in a compact housing to ensure stable and reliable performance.
Attenuators are based on a Brewster-type thin film polarizer fixed at 56° and a quartz waveplate. The polarizer's angle of incidence can be manually adjusted to achieve the best contrast or to manipulate the direction of the reflected s-polarized beam. The waveplate is housed in a 360° continuous rotation mount, which can be manually rotated to control the output power of the transmitted and reflected beams.