Patent ID: 6983005

Claim:
A holographic laser comprising: a first light source for emitting a light beam L 1 of a first wavelength toward an optical disk; a second light source for emitting a light beam L 2 of a second wavelength different from the first wavelength toward an optical disk, the second light source being positioned near the first light source; a wavelength separating element for separating the light beam L 1 and the light beam L 2 reflected by the respective optical disks; a first holographic element for converging the light beam L 1 separated by the wavelength separating element; a second holographic element for converging the light beam L 2 separated by the wavelength separating element; and a light receiving element for receiving the light beam L 1 converged by the first holographic element and the light beam L 2 converged by the second holographic element, wherein the first holographic element is arranged at a position so that the light beam L 1 of the first wavelength emitted from the first light source toward the optical disk does not pass through the first holographic element and the light beam L 1 of the first wavelength reflected by the optical disk passes through the first holographic element; wherein the second holographic element is arranged at a position so that the light beam L 2 of the second wavelength emitted from the second light source toward the optical disk and the light beam L 2 reflected by the optical disk pass through the second holographic element; wherein the light receiving element is positioned between a focal position of 0th order diffracted light of the first holographic element and a focal position of 0th order diffracted light of the second holographic element; and wherein the first light source, the second light source, the wavelength separating element, the first holographic element, and the second holographic element are integrally formed into a single component.