Technology

Research and development of cutting-edge optical thin film deposition technology and applied products

Koshin has devoted a lot of effort for research and development of the cutting-edge optical thin film filters and its applications for more than fifty years. We will continue to explore new technologies of forming thin films and to create its new application.

Linear Transmittance Filter (LTF)
06/12/2025

A Linear Transmittance Filter is an optical filter used in many feilds. The transmission spectrum [...]

Linear Variable Filters
02/18/2025

A linear variable filters is an optical filter used in many feilds. The transmission spectrum [...]

Raman Longpass Filter
09/06/2024

Raman Filter is an optical filter used in Raman spectroscopy. We have recentry developed long [...]

Customized Filter for SWIR
03/16/2023

SWIR filter (Broadband filter) Short wavelength infrared (SWIR) light is generally defined as light in [...]

Customized Filters for Spectral Analysis II
09/08/2022

Steep-Edge Long Pass Filters Steep-edge Long Pass Filters provide very steep cut-on slope, deep rejection [...]

Customized Filters for Spectral Analysis I
09/08/2022

Notch filters Notch filters, or band stop filters, reflect and remove the specific narrow wavelength [...]

Customized Filters for LiDAR
09/08/2022

Low incident angle dependence band pass fitlers The transmission spectrum of band pass filters composed [...]

Customized Filters
09/08/2022

We are constantly striving to improve our optical thin-film coating technologies and the adaptability to [...]