PROJECTOR

• Main Authors: KAWAMURA MASAKAZU, IIJIMA CHIYOAKI, TSUCHIYA YUTAKA
• Format: Patent
• Language: English; Japanese
• Published: 28.05.2015
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BLASTING; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HEATING; HOLOGRAPHY; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

PROBLEM TO BE SOLVED: To provide a projector that includes a light source device emitting light in a narrow wavelength band, and can project images with suppressed unevenness in brightness and unevenness in colors.SOLUTION: A projector includes a light source device, a light modulation device that modulates light emitted from the light source device according to image information, and a projection optical system that projects the light modulated in the light modulation device. The light source device emits first light La in a narrow wavelength band having a first wavelength λ1 in which the intensity of light peaks, and second light Lb in a narrow wavelength band having a second wavelength λ2 in which the intensity of light peaks, where the distance between the first wavelength λ1 and second wavelength λ2 is more than 1/4 and less than 3/4 of the wavelength of one cycle of ripples located in wavelength areas of the first light La and second light Lb, of the ripples included in the spectral spectrum of reflection light of light made incident on the light modulation device. 【課題】狭波長帯域の光を射出する光源装置を備え、明るさのムラや色ムラを抑制した画像の投写が可能なプロジェクターを提供する。【解決手段】プロジェクターは、光源装置、光源装置から射出された光を画像情報に応じて変調する光変調装置、および光変調装置にて変調された光を投写する投写光学系を備える。光源装置は、光強度がピークとなる第１波長λ１を有する狭波長帯域の第１の光Ｌａ、および光強度がピークとなる第２波長λ２を有する狭波長帯域の第２の光Ｌｂを有する光を射出し、第１波長λ１と、第２波長λ２との間隔は、光変調装置の入射光に対する反射光の分光スペクトルが有するリップルのうち、第１の光Ｌａおよび第２の光Ｌｂの波長領域に位置するリップルの１周期波長の１／４を超え、３／４未満である。【選択図】図５