| 摘要 |
PROBLEM TO BE SOLVED: To improve the light availability of an optical element. SOLUTION: Two polarized light converting element arrays 320a and 320b in each of which a plurality of polarized light converting elements which emit incident light after converting the incident light into linearly polarized light rays polarized in a prescribed direction is arranged along an arraying direction which is at least either one of the row direction and column direction of the array are faced oppositely to each other on both sides a prescribed clearance Cp provided at nearly the center of the light emitting surface of a lens array 310 in the arraying direction. Of the luminous fluxes (s-polarized light and p-polarized light) which are condensed by and emitted from the array 310, the luminous flux L2 which is not made incident to the array 320a, but passes through the clearance Cp, contains prescribed polarized light (s-polarized light) which is to be emitted essentially and ineffective polarized light (p-polarized light). Of the light rays emitted through the clearance Cp, in addition, only the necessary polarized light can be utilized as an effective luminous flux by providing a polarizing plate, etc., on the outgoing side of the clearance Cp. |
