Edmund Optics' stem mirror reduces surface stress and distortion.

エドモンド・オプティクス・ジャパン
In August 2022, Edmund Optics Japan Co., Ltd. expanded its inventory of products by enhancing its lineup of "stem mirrors" with various coatings that cater to a wide range of wavelength bands. This product expansion increases the options for optical integrators to meet the unique demands of applications, enabling rapid prototyping and product development. Additionally, the stress applied to the optical surface of the mirrors is almost eliminated, resulting in improved surface flatness and performance compared to surface mirror-type mirrors installed using conventional methods.
