Light scanning apparatus
First Claim
1. A light scanning apparatus comprising:
- a first light source for emitting a light beam with which a predetermined irradiation region is irradiated;
a reflector for reflecting the light beam emitted from the first light source so as to lead the light beam to the predetermined irradiation region;
a retaining frame having a plurality of coupling portions which are coupled to a circumferential edge portion of the reflector, for retaining the reflector via the coupling portions so that the reflector is angularly displaceable;
a substrate for supporting the retaining frame;
a second light source for emitting a light with which the reflector is to be irradiated;
a light receiving section for receiving a reflected light which has been emitted from the second light source and reflected by the reflector;
a driving section for angularly displacing the reflector so that the predetermined irradiation region is scanned with the light beam from the first light source; and
a control section for controlling an angular displacement operation of the reflector through the driving section, on the basis of light receiving amount and light receiving region of the light received by the light receiving section,wherein the light receiving section has a light receiving element which produces an electronic signal according to the light receiving amount and light receiving region of the received light,wherein a signal output section which outputs an electronic signal produced by the light receiving element, and the light receiving element and the signal output section are formed integrally with the substrate, andwherein a light receiving surface of the light receiving section is in parallel with a reflecting surface, which reflects the light from the second light source, of the reflector in a standard angular position.
1 Assignment
0 Petitions
Accused Products
Abstract
A light is emitted from a light emitting element toward the other surface in a thickness direction of a scanning mirror which can be angularly displaced about an axial line. At least either one of a first light receiving portion and a second light receiving portion receives a light which is emitted from the light emitting element and reflected by a reflecting mirror. The first light receiving portion, the second light receiving portion, and the signal output section produce an electronic signal containing position information which indicates a position which is irradiated with the above-mentioned light. This position information indicates an amount of angular displacement of the scanning mirror. On the basis of this position information, a driving section scans the scanning mirror so that the predetermined irradiation position can be irradiated with a light emitted from a first light source.
5 Citations
15 Claims
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1. A light scanning apparatus comprising:
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a first light source for emitting a light beam with which a predetermined irradiation region is irradiated; a reflector for reflecting the light beam emitted from the first light source so as to lead the light beam to the predetermined irradiation region; a retaining frame having a plurality of coupling portions which are coupled to a circumferential edge portion of the reflector, for retaining the reflector via the coupling portions so that the reflector is angularly displaceable; a substrate for supporting the retaining frame; a second light source for emitting a light with which the reflector is to be irradiated; a light receiving section for receiving a reflected light which has been emitted from the second light source and reflected by the reflector; a driving section for angularly displacing the reflector so that the predetermined irradiation region is scanned with the light beam from the first light source; and a control section for controlling an angular displacement operation of the reflector through the driving section, on the basis of light receiving amount and light receiving region of the light received by the light receiving section, wherein the light receiving section has a light receiving element which produces an electronic signal according to the light receiving amount and light receiving region of the received light, wherein a signal output section which outputs an electronic signal produced by the light receiving element, and the light receiving element and the signal output section are formed integrally with the substrate, and wherein a light receiving surface of the light receiving section is in parallel with a reflecting surface, which reflects the light from the second light source, of the reflector in a standard angular position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A light scanning apparatus comprising:
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a first light source for emitting a light beam with which a predetermined irradiation region is to be irradiated; a reflector for reflecting the light beam emitted from the first light source so as to lead the light beam to the predetermined irradiation region; a retaining frame having a plurality of coupling portions which are coupled to a circumferential edge portion of the reflector, for retaining the reflector via each of the coupling portions so that the reflector is angularly displaceable; a second light source for emitting a light; a light receiving section for receiving the light emitted from the second light source; a driving section for angularly displacing the reflector so that the predetermined irradiation region is scanned with the light beam from the first light source; and a control section for controlling an angular displacement operation of the reflector through the driving section, on the basis of light receiving amount and light receiving region of the light received by the light receiving section, wherein the light receiving section has a light receiving element which produces an electronic signal according to the light receiving amount and light receiving region of the received light, and the second light source has a light emitting element, and wherein the reflector is provided with one of the light emitting element and the light receiving element, and the retaining frame is provided with the other one of the light emitting element and the light receiving element. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification