Ushio Denki Kabushiki Kaisha

Takahiro Toma

Masashi Okamoto

Yuichi Miura

Mikio Shimizu

Yoshihiro Horikawa

Kazuhiro Goto

Akihiko Sugitani

Toru Kontani

Shoichi Terada

Provided are a coherent light source apparatus and a projector. A first light emission region is formed on basis of a coherent light source; a first optical system projects light derived from a first light emission region to form a second light emission region; a light deflection section deflects a bundle of rays in vicinity of the second light emission region; a second optical system downstream of the light deflection section; and a light mixing section downstream of the second optical system that mixes components of angles and positions of rays incident on an incident end. The second optical system forms an image conjugate to the first light emission region and a third light emission region substantially conjugate to an exit pupil of the first optical system. The light deflection section continues to cause a direction in which the bundle of rays is deflected to be continuously changed.

Coherent light source device and projector

A coherent light source apparatus includes a coherent light source, a first optical system, a light deflection unit, a second optical system and a light mixing unit disposed in that order. The coherent light source forms a first light emission region, and light projected therefrom forms a second light emission region near the light deflection unit, which deflects light flux from the second light emission region. The second optical system forms a third light emission region which is conjugate to the second light emission region near an input end of the light mixing unit, which mixes angle and a position components of incident light. The light deflection unit is configured to continuously changing a direction in which the light flux is deflected, thereby reducing speckling in light emitted from the light mixing unit.

Coherent light source apparatus and projector

A light source device which can also advantageously control the growth of the projection using the DMD type is achieved in a light source device which has an ultrahigh pressure discharge lamp) in which the silica glass discharge vessel is filled with greater than or equal to 0.15 mg/mmmercury and bromine; a feed device; an oval reflector; and a color wheel by the electrode on the side of the opening of the oval reflector of the discharge lamp having an increased diameter, and the relation 0.06&#x3c;W/I&#x3c;0.96 between the volume W (mm) of the tip area with increased diameter and the current value I being satisfied.

Light source device

Optical apparatus with a discharge lamp and a concave reflecting mirror, the concave reflecting mirror has a front elliptical reflecting mirror portion, a middle spherical reflecting mirror portion, and a rear elliptical reflecting mirror portion; the relationship between an angle &#x3b1; between a virtual tangential line VTL, which runs from the center position between the electrodes to the outer surface of the electrode positioned towards the neck of the concave reflecting mirror, and the beam axis Z and an angle &#x3b2; between a virtual straight line VSL, which runs from the center position between the electrodes to the boundary position between the middle spherical reflecting mirror portion and the rear elliptical reflecting mirror portion, and the beam axis Z is &#x3b2;&#x3e;&#x3b1;; and the relationship between the volume V of the electrode E(mm) and the wattage (P) meets the condition, 0.07&#xd7;EXP(0.014&#xd7;P)&#x3c;V.

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Hyogo, Japan

Takahiro Toma