Illuminating optical device
First Claim
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1. An illuminating optical device for illuminating an object, comprising:
- a light source including at least two light emitting points symmetric with respect to an optical axis of the illuminating optical device, for emitting light beams approximately toward the object from the two light emitting points without any reflections from said device;
a first concave reflection mirror surface arranged behind said light source and symmetrically with respect to the optical axis to form an image of said light source at a predetermined position directed to an illuminated area, said first concave reflection mirror surface being arranged to reflect a first part of the light beams emitted directly from the two light emitting points approximately toward the object directly; and
a second concave reflection mirror surface arranged closer to the object along the optical axis than said first concave reflection mirror surface and symmetrically with respect to the optical axis to direct the light beam to the light emitting points of said light source, said second concave reflection mirror surface being arranged to reflect light beams each travelling from one of the two light emitting points to said first concave reflection mirror surface so that the each of the light beams is directed approximately toward the object by said first concave reflection mirror surface;
a second part of the light beams travelling directly from the light emitting points of said light source to said first concave reflection mirror surface and being directed to said second concave reflection mirror surface by said first concave reflection mirror surface so that the second part of the light beams are reflected by said second and first concave reflection mirror surfaces in sequence and then directed approximately toward the object.
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Abstract
An illuminating optical device includes a light source including two light emitting points which are symmetric with respect to an optical axis of the illuminating optical device, a first concave reflection mirror plane arranged behind the light source and symmetrically to the optical axis in order to form an image of the light source at a predetermined position of an illuminated area, and a second concave reflection mirror plane arranged more closely to the illuminated area than the first concave reflection plane and symmetrically to the optical axis in order to direct the light beam to the light emitting points of the light source.
58 Citations
18 Claims
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1. An illuminating optical device for illuminating an object, comprising:
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a light source including at least two light emitting points symmetric with respect to an optical axis of the illuminating optical device, for emitting light beams approximately toward the object from the two light emitting points without any reflections from said device; a first concave reflection mirror surface arranged behind said light source and symmetrically with respect to the optical axis to form an image of said light source at a predetermined position directed to an illuminated area, said first concave reflection mirror surface being arranged to reflect a first part of the light beams emitted directly from the two light emitting points approximately toward the object directly; and a second concave reflection mirror surface arranged closer to the object along the optical axis than said first concave reflection mirror surface and symmetrically with respect to the optical axis to direct the light beam to the light emitting points of said light source, said second concave reflection mirror surface being arranged to reflect light beams each travelling from one of the two light emitting points to said first concave reflection mirror surface so that the each of the light beams is directed approximately toward the object by said first concave reflection mirror surface; a second part of the light beams travelling directly from the light emitting points of said light source to said first concave reflection mirror surface and being directed to said second concave reflection mirror surface by said first concave reflection mirror surface so that the second part of the light beams are reflected by said second and first concave reflection mirror surfaces in sequence and then directed approximately toward the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An illuminating device for an eye, comprising:
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a light source including at least two light emitting points symmetric with respect to an optical axis of the illuminating device, for emitting light beams approximately toward the eye from the two light emitting points without any reflection from said device; a first concave reflection mirror surface arranged behind said light source and symmetrically with respect tot he optical axis to form an image of said light source at a predetermined position directed to the eye, said first concave reflection mirror surface being arranged to reflect a first part of light beams emitted directly from the two light emitting points approximately toward the eye directly; and a second concave reflection mirror surface arranged closer to the eye along the optical axis than said first concave reflection mirror surface and symmetrically with respect to the optical axis to direct the light beam to the light emitting points of said light source, said second concave reflection mirror plane being arranged to reflect light beams each travelling from one of the two light emitting points to said first concave reflection mirror surface so that the each of the light beams is directed approximately toward the eye by said first concave reflection mirror surface; a second part of the light beams travelling directly from the light emitting points of said light source to said first concave reflection mirror surface and being directed to the second concave reflection mirror surface by said first concave reflection mirror surface so that the second part of the light beams are reflected by said second and first concave reflection mirror surfaces in sequence and then directed approximately toward the eye.
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15. An eye fundus camera comprising:
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photographing means for photographing an eye fundus; illuminating means for illuminating the eye fundus; said illumination means including; a light source including at least two light emitting points symmetric with respect to an optical axis of the illuminating device, for emitting light beams approximately toward the eye fundus from the two light emitting points without any reflections from said device; a first concave reflection mirror surface arranged behind said light source and symmetrically with respect to the optical axis to form an image of said light source at a predetermined position directed to the eye fundus, said first concave reflection mirror surface being arranged to reflect a first part of the light beams emitted directly from the two light emitting points approximately toward the eye fundus directly; and a second concave reflection mirror surface arranged closer to the eye fundus along the optical axis than said first concave reflection mirror surface and symmetrically with respect to the optical axis to direct the light beam to the light emitting points of said light source, said second concave reflection mirror plane being arranged to reflect light beams each travelling from one of the two light emitting points to said first concave reflection mirror surface so that the each of the light beams is directed approximately toward the eye fundus by said first concave reflection mirror surface; a second part of the light beams travelling directly from the light emitting points of said light source to said first concave reflection mirror surface being directed to the second concave reflection mirror surface by said first concave reflection mirror surface so that the second part of the light beams are reflected by said second and first concave reflection mirror surfaces in sequence and then directed approximately toward the eye fundus.
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16. An illuminating optical device for illuminating an object, comprising:
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a light source including at least two light emitting points symmetric with respect to an optical axis of the illuminating optical device, for emitting light beams approximately toward the object from the two light emitting points without any reflections from said device; a first concave reflection mirror surface arranged behind said light source and symmetrically with respect to the optical axis to form an image of said light source at a predetermined position directed to an illuminated area, said first concave reflection mirror surface being arranged to reflect at least a part of light beams emitted directly from the two light emitting points approximately toward the object directly; and a second concave reflection mirror surface arranged closer to the eye along the optical axis than said first concave reflection mirror surface and symmetrically with respect to the optical axis to direct the light beam to the light emitting points of said light source, said second concave reflection mirror plane being arranged to reflect light beams each travelling from one of the two light emitting points to said first concave reflection mirror surface so that the each of the light beams is directed approximately toward the object by said first concave reflection mirror surface.
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17. An illuminating device for an eye, comprising:
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a light source including at least two light emitting points symmetric with respect to an optical axis of the illuminating device, for emitting light beams approximately toward the eye from the two light emitting points without any reflections from said device; a first concave reflection mirror surface arranged behind said light source and symmetrically with respect o the optical axis to form an image of said light source at a predetermined position directed to the eye, said first concave reflection mirror surface being arranged to reflect at least a part of the light beams emitted directly from the two light emitting points approximately toward the eye directly; and a second concave reflection mirror surface arranged closer to the eye along the optical axis than said first concave reflection mirror surface and symmetrically with respect to the optical axis to direct the light beam to the light emitting points of said light source, and second concave reflection mirror plane being arranged to reflect light beams each travelling from one of the two emitting points to said first concave reflection mirror surface so that the each of the light beams is directed approximately toward the eye by said first concave reflection mirror surface.
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18. An eye fundus camera comprising:
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photographing means for photographing an eye fundus; illumination means for illuminating the eye fundus; said illumination means including; a light source including at least two light emitting points symmetric with respect to an optical axis of the illuminating device, for emitting light beams approximately toward the eye fundus from the two light emitting points without any reflections from said device; a first concave reflection mirror surface arranged behind said light source and symmetrically with respect tot he optical axis to form an image of said light source at a predetermined position directed to the eye fundus, said first concave reflection mirror surface being arranged to reflect at least a part of the light beams emitted directly from the two light emitting points approximately toward the eye fundus direction directly; and a second concave reflection mirror surface arranged closer to the eye fundus along the optical axis than said first concave reflection mirror surface and symmetrically with respect to the optical axis to direct the light beam tot he light emitting points of said light source, said second concave reflection mirror plane being arranged to reflect light beams each travelling from one of the two light emitting points to said first concave reflection mirror surface so that the each of the light beams is directed approximately toward the eye fundus by said first concave reflection mirror surface.
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Specification