| 摘要 |
PURPOSE:To develop a video device which can obtain a high-quality video by using plural inexpensive dichroic mirrors whose cutoff wavelength is unified. CONSTITUTION:Four dichroic mirrors respectively having one cutoff wavelength are used in this device, which is constructed so that a 1st optical system including the 1st, the 3rd and the 4th dichroic mirrors 60, 62 and 63 separates red light, a 2nd optical system including the 1st, the 2nd, the 3rd and the 4th dichroic mirrors 60-63 separates green light, and a 3rd optical system including the 1st, the 2nd and the 4th dichroic mirrors 60, 61 and 63 separates the blue light. |
