Patent ID: 11889032
Assignee: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. The method according to claim 15, wherein the constraint condition comprises:
a difference between the central wavelength of the near-infrared light passing through the first light filter and the central wavelength for the near-infrared light compensation by the first light compensation apparatus is within a wavelength fluctuation range, and the wavelength fluctuation range is 0 nm to 20 nm; or
a semi-bandwidth of the near-infrared light passing through the first light filter is less than or equal to 50 nm; or
a first wave-band width is less than a second wave-band width, wherein the first wave-band width is a wave-band width of the near-infrared light passing through the first light filter; and the second wave-band width is a wave-band width of near-infrared light blocked by the first light filter; or
a third wave-band width is less than a reference wave-band width, wherein the third wave-band width is a wave-band width of near-infrared light with a passing rate being greater than a specified proportion, and the reference wave-band width is any wave-band width in a wave band range of 50 nm to 150 nm.