摘要:
A lighting device that lights a discharge lamp which contains a pair of electrodes and light emission substance including mercury, includes: a first terminal connected with the electrode to which mercury easily adheres, and a second terminal connected with the electrode to which mercury is difficult to adhere; a setting unit which sets AC current supplied to the first and second terminals in a starting period from insulation break down of the discharge lamp until start of discharge between the tips of the pair of the electrodes; and a supplying unit which supplies AC current set by the setting unit to the first and second terminals, wherein the setting unit sets AC current such that the half-cycle electric quantity supplied to the first terminal becomes larger than the half-cycle electric quantity supplied to the second terminal in the initial term of the starting period under the condition in which the first terminal initially operates as cathode, and that the half-cycle electricity quantities supplied to the first and second terminals become substantially equal in the final term of the starting period.
摘要:
A light source unit including an arc tube having a light emitting section, sealed sections, an elliptic reflector, and a secondary reflecting mirror to cover the front side of the light emitting section and reflect a luminous flux radiated from the light emitting section toward the elliptic reflector. The center of discharging emission from the arc tube is disposed at a first focal position of the elliptic reflector, and the secondary reflecting mirror is configured as a separate member from the arc tube, so that the outer peripheral portion of the secondary reflecting mirror is accommodated within a circular cone connecting a second focal position of the elliptic reflector and the distal end of the front sealed section of the arc tube when being mounted to the front sealed section of the arc tube.
摘要:
The invention provides an illumination system that can include a first reflecting mirror arranged on a rear side of a light-emitting portion of the illumination system including an arc tube, and a second reflecting mirror arranged on the front side of the light-emitting portion of an optical system. The system is arranged so that the diameter on a reflecting surface of the first reflecting mirror corresponding to the available marginal light emitted from the light-emitting portion to the rear side of the illumination system is larger than the diameter of the outer surface of the second reflecting mirror and the diameter of the outer surface of the second reflecting mirror is set to a size within the light as the available marginal light reflected by the first reflecting mirror, a reflecting surface of the second reflecting mirror surrounds about half of the front side of the light-emitting portion, and the light emitted from the center of the light-emitting portion and incident on the second reflecting mirror agrees with the normal of the second reflecting mirror.
摘要:
The invention provides an illumination system that can include a first reflecting mirror arranged on a rear side of a light-emitting portion of the illumination system including an arc tube, and a second reflecting mirror arranged on the front side of the light-emitting portion of an optical system. The system is arranged so that the diameter on a reflecting surface of the first reflecting mirror corresponding to the available marginal light emitted from the light-emitting portion to the rear side of the illumination system is larger than the diameter of the outer surface of the second reflecting mirror and the diameter of the outer surface of the second reflecting mirror is set to a size within the light as the available marginal light reflected by the first reflecting mirror, a reflecting surface of the second reflecting mirror surrounds about half of the front side of the light-emitting portion, and the light emitted from the center of the light-emitting portion and incident on the second reflecting mirror agrees with the normal of the second reflecting mirror.
摘要:
A light source device includes: a light source lamp that has a light-emitting portion and sealing sections provided on both sides of the light-emitting portion; a reflector that aligns and irradiates a light beam radiated by the light source lamp in a predetermined direction; and a sub-reflection mirror of which reflection surface opposes to a reflection surface of the reflector and reflects the light beam radiated by the light-emitting portion of the light source lamp toward the reflector. In the sub-reflection mirror, an adhesion surface of an insertion hole is bonded to the sealing section by an adhesive in a condition that the sealing section is inserted in the insertion hole. A cutting portion of the sub-reflection mirror is so formed to extend over a portion bonded by the adhesive in plan view.
摘要:
A light source device includes a light-emitting tube and a reflector. The light-emitting tube has a light-emitting portion that generates a light beam by an electric discharge between electrodes, and sealing portions provided on both sides of the light-emitting portion. The light-emitting tube has a sub-reflection mirror that covers substantially a front half of the light-emitting portion. The reflector has a neck portion provided with an insertion hole to which the light-emitting tube is inserted, and a reflecting portion integrally formed with the neck portion and having an ellipsoidal curved reflecting surface that irradiates the light beam emitted by the light-emitting portion to align the light beam in a predetermined direction. The opening diameter of the insertion hole on the side of the reflecting surface is greater than the external diameter of the sub-reflection mirror and within the internal diameter of a valid reflection area of the reflector.
摘要:
A light source device includes: a light-emitting tube including a light-emitting portion that generates a light beam by an electric discharge between electrodes and sealing portions provided on both sides of the light-emitting portion; a reflector including a neck portion provided with an insertion hole to which the light-emitting tube is inserted, and a reflecting portion integrally formed with the neck portion and having an ellipsoidal curved reflecting surface that irradiates forward the light beam emitted by the light-emitting portion and aligns the light beam in a predetermined direction. The light-emitting tube has a sub-reflection mirror that covers substantially front half of the light-emitting tube. The insertion hole has a diameter that is enlarged from the base end thereof toward the distal end in a light irradiation direction. The opening diameter of the insertion hole on the side of the reflecting surface is greater than the external diameter of the sub-reflection mirror while the opening internal diameter is within the diameter of a valid reflection area of the reflector, the diameter being defined by a front focal position of the reflector and the outer periphery of the sub-reflection mirror.
摘要:
Exemplary embodiments of the present invention include a light source unit in which lowering of an illumination intensity of an emitted luminous flux is reduced or prevented. A light source lamp unit includes a light source lamp having a light emitting section in which discharging emission is performed between electrodes, an elliptic reflector to emit a luminous flux radiated from the light source lamp in a certain uniform direction, and a secondary reflecting mirror provided on the opposite side of the light source lamp opposite from the elliptic reflector. A center of light emission C2 between the electrodes does not match a first focal point F1 of the elliptic reflector, a center of the source of reflected light C1 of the secondary reflecting mirror does not match the first focal point F1 of the elliptic reflector. The center of light emission C2, the first focal point F1, and the center of the source of reflected light C1 are disposed on a straight line perpendicular to a straight line connecting the first focal point F1 and a second focal point F2 of the elliptic reflector.
摘要:
A lighting unit including a light source lamp having a light emitting tube and an ellipsoid reflector, and an optical lens to parallelize illumination light released from the reflector, characterized in that: a first focal point P1, which is one of the two focal points P1 and P2 positioned inside and outside the reflector and is located on the side of the reflecting surface of the reflector, is contained within the light emitting tube, and a light emission center Q of the light emitting tube is offset in a virtual plane perpendicular to a reflector central axis OC; and a parallelizing lens has a lens optical axis on a reference axis L parallel to the reflector central axis OC, and the lens optical axis of the parallelizing lens is offset in a direction opposite to a direction where the emission center Q of the light emitting tube is offset from the reflector central axis OC.
摘要:
To reduce or prevent adhesive particles from being scattered toward a light-emitting portion of an arc tube and an auxiliary reflecting surface of an auxiliary mirror even when an inorganic adhesive injected for fixing the auxiliary mirror to the arc tube is boiled, a method of manufacturing a light source lamp includes: setting a light-reflecting surface of the auxiliary mirror so as to face the light-emitting portion of the arc tube and injecting an adhesive into a gap between the auxiliary mirror and the arc tube; heating and curing the adhesive from a side nearer to the light-emitting portion of the arc tube; and attaching the reflector to the arc tube with the auxiliary mirror fixed thereto. For example, a heated air blowoff and light irradiation toward the adhesive form the side nearer to the light-emitting portion of the arc tube may be performed. Further, a projector includes: an illumination system with the light source lamp; an optical modulator; and a projector lens.