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1. 发明专利

DE69319009T2 未知
公开(公告)号：DE69319009T2
公开(公告)日：1998-12-17
申请号：DE69319009
申请日：1993-03-17
申请人： CANON KK
发明人： KIMURA KAZUMI , MITSUTAKE HIDEAKI , YANO KOHTARO , KAWASAKI SHIGERU , KURAMOCHI JUNKO
IPC分类号： G02B17/00 , F21V7/09 , F21V13/04 , G02B17/06 , G03B21/20 , H04N9/31 , G03B27/54
摘要： This invention provides a projector capable of effectively utilizing the light from the light source and significantly reducing the light illuminating the outside of the area to be illuminated, thereby attaining an excellent efficiency of light utilization. In the illuminating system of the present invention provided with a light source and a reflector, there is further provided a circular reflector of a spherical surface, for returning the light, which emerges from the light source to the outside of the area to be illuminated, without being reflected on the reflector, to the light source. Also there is provided a flat mirror or a substantially spherical sub reflector for returning the light, which proceeds to the outside of the area to be illuminated, after being reflected on the reflector, to the light source. The sub reflector may be provided in the vicinity of the light source.

2. 发明专利

AT162921T 未知
公开(公告)号：AT162921T
公开(公告)日：1998-02-15
申请号：AT91304028
申请日：1991-05-03
申请人： CANON KK
发明人： TSUJI SADAHIKO , SUZUKI HIDETOSHI , MITSUTAKE HIDEAKI , KUREMATSU KATSUMI , MOCHIZUKI NORITAKA , MINOURA NOBUO , KAWASAKI SHIGERU , KIMURA KAZUMI , SHINGAKI JUNKO
IPC分类号： G02B27/28 , H04N9/31 , F21V7/09 , G02B19/00
摘要： This specification discloses a polarization converting apparatus having means emitting non-polarized light, and polarizing means having a light incidence surface and a light emergence surface, the polarizing means receiving the non-polarized light by the light incidence surface and causing polarized light to emerge from the light emergence surface, the size and shape of the light incidence surface being similar to the size and cross-sectional shape of the non-polarized light. The specification also discloses an optical instrument having such apparatus.

3. 发明专利

DE69128979T2 未知
公开(公告)号：DE69128979T2
公开(公告)日：1998-08-06
申请号：DE69128979
申请日：1991-05-17
申请人： CANON KK
发明人： MITSUTAKE HIDEAKI , KAWASAKI SHIGERU
IPC分类号： G02B5/30 , G02B27/28 , G02F1/1335 , G02F1/13357 , G03B33/12 , H04N5/74 , H04N9/31
摘要： A polarization converting device (200) for converting a light from a light source (21) into a polarized light comprises a first prism (31) having a first slant plane (31a) for receiving the light from the light source and dividing it into first and second lights with their polarized planes orthogonal, a first emergent surface from which the first light exits, and a second emergent surface from which the second light exits, a second prism (32) having an incident surface opposed to the second emergent surface of the first prism, a second slant (32a) plane for reflecting and deflecting the second light from the incident surface so as to direct it to an optical path (Lp*) almost parallel to that of the first light (Lp), and a third emergent surface from which the second light reflected from the second slant plane exits, and a transparent layer (36) carried between the second emergent surface of the first prism and the incident surface of the second prism, the transparent layer having a smaller refractive index than the first prism.

4. 发明专利

DE69128810D1 未知
公开(公告)号：DE69128810D1
公开(公告)日：1998-03-05
申请号：DE69128810
申请日：1991-05-03
申请人： CANON KK
发明人： TSUJI SADAHIKO , SUZUKI HIDETOSHI , MITSUTAKE HIDEAKI , KUREMATSU KATSUMI , MOCHIZUKI NORITAKA , MINOURA NOBUO , KAWASAKI SHIGERU , KIMURA KAZUMI , SHINGAKI JUNKO
IPC分类号： G02B27/28 , H04N9/31 , F21V7/09 , G02B19/00
摘要： This specification discloses a polarization converting apparatus having means emitting non-polarized light, and polarizing means having a light incidence surface and a light emergence surface, the polarizing means receiving the non-polarized light by the light incidence surface and causing polarized light to emerge from the light emergence surface, the size and shape of the light incidence surface being similar to the size and cross-sectional shape of the non-polarized light. The specification also discloses an optical instrument having such apparatus.

5. 发明专利

CA2065584C PLATE-LIKE POLARIZING ELEMENT, A POLARIZING CONVERSION UNIT PROVIDED WITH THE ELEMENT, AND A PROJECTOR PROVIDED WITH THE UNIT 未知
公开(公告)号：CA2065584C
公开(公告)日：1996-02-13
申请号：CA2065584
申请日：1992-04-08
申请人： CANON KK
发明人： MITSUTAKE HIDEAKI , MOCHIZUKI NORITAKA , KAWASAKI SHIGERU , KIMURA KAZUMI , SHINGAKI JUNKO
IPC分类号： G02B5/30 , G02B27/28 , G03B21/00 , G03B33/12 , H04N5/74 , H04N9/31 , G02B27/10
摘要： This specification discloses a plate-like polarizing element for converting light into polarized light having a plurality of units arranged along a common plane across the light, each of the units being provided with dividing means for dividing the light into reflected light and transmitted light whose planes of polarization are orthogonal to each other, varying means for varying the polarized state of at least one of the reflected light and the transmitted light to thereby make the planes of polarization of the two lights coincident with each other, and reflecting means for reflecting one of the reflected light and the transmitted light and directing it substantially in the same direction as the direction of travel of the other. The specification also discloses a polarizing conversion unit provided with such plate-like polarizing element, and a projector provided with such unit.

6. 发明专利

DE69128810T2 未知
公开(公告)号：DE69128810T2
公开(公告)日：1998-05-28
申请号：DE69128810
申请日：1991-05-03
申请人： CANON KK
发明人： TSUJI SADAHIKO , SUZUKI HIDETOSHI , MITSUTAKE HIDEAKI , KUREMATSU KATSUMI , MOCHIZUKI NORITAKA , MINOURA NOBUO , KAWASAKI SHIGERU , KIMURA KAZUMI , SHINGAKI JUNKO
IPC分类号： G02B27/28 , H04N9/31 , F21V7/09 , G02B19/00
摘要： This specification discloses a polarization converting apparatus having means emitting non-polarized light, and polarizing means having a light incidence surface and a light emergence surface, the polarizing means receiving the non-polarized light by the light incidence surface and causing polarized light to emerge from the light emergence surface, the size and shape of the light incidence surface being similar to the size and cross-sectional shape of the non-polarized light. The specification also discloses an optical instrument having such apparatus.

7. 发明专利

DE69221002T2 未知
公开(公告)号：DE69221002T2
公开(公告)日：1998-02-12
申请号：DE69221002
申请日：1992-04-08
申请人： CANON KK
发明人： MITSUTAKE HIDEAKI , MOCHIZUKI NORITAKA , KAWASAKI SHIGERU , KIMURA KAZUMI , SHINGAKI JUNKO
IPC分类号： G02B5/30 , G02B27/28 , G03B21/00 , G03B33/12 , H04N5/74 , H04N9/31 , G02F1/1335
摘要： This specification discloses a plate-like polarizing element for converting light into polarized light having a plurality of units arranged along a common plane across the light, each of the units being provided with dividing means for dividing the light into reflected light and transmitted light whose planes of polarization are orthogonal to each other, varying means for varying the polarized state of at least one of the reflected light and the transmitted light to thereby make the planes of polarization of the two lights coincident with each other, and reflecting means for reflecting one of the reflected light and the transmitted light and directing it substantially in the same direction as the direction of travel of the other. The specification also discloses a polarizing conversion unit provided with such plate-like polarizing element, and a projector provided with such unit.

8. 发明专利

DE69221002D1 未知
公开(公告)号：DE69221002D1
公开(公告)日：1997-09-04
申请号：DE69221002
申请日：1992-04-08
申请人： CANON KK
发明人： MITSUTAKE HIDEAKI , MOCHIZUKI NORITAKA , KAWASAKI SHIGERU , KIMURA KAZUMI , SHINGAKI JUNKO
IPC分类号： G02B5/30 , G02B27/28 , G03B21/00 , G03B33/12 , H04N5/74 , H04N9/31 , G02F1/1335
摘要： This specification discloses a plate-like polarizing element for converting light into polarized light having a plurality of units arranged along a common plane across the light, each of the units being provided with dividing means for dividing the light into reflected light and transmitted light whose planes of polarization are orthogonal to each other, varying means for varying the polarized state of at least one of the reflected light and the transmitted light to thereby make the planes of polarization of the two lights coincident with each other, and reflecting means for reflecting one of the reflected light and the transmitted light and directing it substantially in the same direction as the direction of travel of the other. The specification also discloses a polarizing conversion unit provided with such plate-like polarizing element, and a projector provided with such unit.

9. 发明专利

AT155898T 未知
公开(公告)号：AT155898T
公开(公告)日：1997-08-15
申请号：AT92106085
申请日：1992-04-08
申请人： CANON KK
发明人： MITSUTAKE HIDEAKI , MOCHIZUKI NORITAKA , KAWASAKI SHIGERU , KIMURA KAZUMI , SHINGAKI JUNKO
IPC分类号： G02B5/30 , G02B27/28 , G03B21/00 , G03B33/12 , H04N5/74 , H04N9/31 , G02F1/1335
摘要： This specification discloses a plate-like polarizing element for converting light into polarized light having a plurality of units arranged along a common plane across the light, each of the units being provided with dividing means for dividing the light into reflected light and transmitted light whose planes of polarization are orthogonal to each other, varying means for varying the polarized state of at least one of the reflected light and the transmitted light to thereby make the planes of polarization of the two lights coincident with each other, and reflecting means for reflecting one of the reflected light and the transmitted light and directing it substantially in the same direction as the direction of travel of the other. The specification also discloses a polarizing conversion unit provided with such plate-like polarizing element, and a projector provided with such unit.

10. 发明专利

DE69207362D1 未知
公开(公告)号：DE69207362D1
公开(公告)日：1996-02-15
申请号：DE69207362
申请日：1992-10-20
申请人： CANON KK
发明人： MITSUTAKE HIDEAKI , YANO KOHTARO , KAWASAKI SHIGERU , KIMURA KAZUMI , SHINGAKI JUNKO
IPC分类号： F21S8/00 , F21V5/04 , F21V7/09 , G02F1/13357 , H04N5/74 , H04N9/31 , G02F1/1335
摘要： This invention relates to an optical system such as a projector, including a light source and an illuminating system. The projector of this invention is provided with: a light source having first and second high-luminance light-emitting areas; an illuminating optical system for directing the light from the light source toward an object to be illuminated, wherein the first and second high-luminance light-emitting areas are positioned on the optical axis of the illuminating optical system; and a projection optical system for projecting the light emerging from the illuminated object; wherein the illuminating optical system is constructed in such a manner that the central area of the illuminated object is illuminated by the light beam from the first high-luminance light-emitting area and the peripheral area of the illuminated object is illuminated by the light beam from the first and second high-luminance light-emitting areas.

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