Optical metrology of the filters for the Multi-Channel Imager of the CSST

The Multi-Channel Imager (MCI) is a panchromatic imager that will be deployed in the China Space Station Telescope. It is a powerful near-ultraviolet (NUV) and visible imager on CSST, with a wavelength coverage spanning 255nm to 1000 nm. The MCI high sensitivity, high spatial resolution, and. large field-of-view (FOV) will provide the astronomer with a set of tools for astrophysical. The MCI consists of three imaging channels, which are the NUV channel, the Optical-blue channel and the Optical-red channel, each with its own complement of filters. Each channel of the MCI uses a 9kx9k e2v CCD to cover a 7.5′×7.5′ field of view (FOV). The filter complement, which includes broad, medium, and narrow band filters, naturally reflects the diversity of astronomical programs to be targeted with MCI.