Color stripe filter in color image pickup apparatus

• Main Authors: NAKAGAKI, SHINTARO SHONAN RAIFU TAUN, TAKANASHI, ITSUO 3-7-12, OOMACHI, NEGISHI, ICHIRO, KITAMI, KAORU, ICHIMURA, HIROSHI, KATASE, WATARU, OSADA, MASARU
• Format: Patent
• Language: English; French; German
• Published: 05.07.1989
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

A color separation stripe filter (F) is used in a color image pickup apparatus so as to generate a color multiplexed signal (sm). The filter comprises a plurality of recurrent groups of three different color stripes (Cy,G,R) successively arranged at periodic intervals (T). The first color stripe has a characteristic showing a peak transmission factor (a) in a red color region, the second color stripe has a characteristic showing a peak transmission factor (b) in a green color region which is substantially equal to the peak transmission factor (a) of the first color stripe, and the third color stripe has a characteristic showing a negative peak transmission factor (c) at a wavelength between 500 nm and 530 nm so as to produce first and second peak transmission factors in a blue region (d) and said green region (e). The first peak transmission factor (d) is substantially equal to the peak transmission factors of the first (a) and second (b) color stripes, and the second peak transmission factor (e) existing in the green color region is 50% to 80% of the peak transmission factors of the first (a) and second (b) color stripes; the curve of the characteristic of the third color stripe in the green region being substantially similar in configuration to that of the second color stripe (b).