Back to results
US 7,116,494 B2Granted
Optical apparatus and method for adjusting amount of light of the same
AssigneeSharp Kabushiki Kaisha
InventorMasahiro Yamazaki
Life of this patent
Estimating the term…
Abstract
An optical apparatus provided in an optical pickup includes first and second light sources, a light splitting element, a condensing lens, a mounting base, a light receiving element, and a protruding piece formed on the condensing lens. The condensing lens guides transmission light from the first light source or reflection light from the second light source that are split by the light splitting element to the light receiving element. By grasping the protruding piece to protrude in a direction perpendicular to a lens axis of the condensing lens, and adjusting a mounting position of the condensing lens on the mounting base, a sufficient amount of light for stable control of a light output is applied to the light receiving element for light output monitor.
Claims19
An optical apparatus comprising:
- a light source for emitting light;
- a light splitting element for splitting light by transmitting or reflecting part of the light emitted from the light source;
- a light receiving element for receiving the transmission light or reflection light split by the light splitting element;
- a condensing lens, disposed between the light splitting element and the light receiving element, for guiding the transmission light or reflection light split by the light splitting element to the light receiving element;
- a mounting base for mounting the condensing lens;
- and
- an adjusting means for adjusting a mounting position of the condensing lens on the mounting base, wherein the adjusting means includes a protruding piece formed so as to protrude from the condensing lens in a direction perpendicular to a central axis of the condensing lens and extend like a rod.
4 more elements
An optical apparatus comprising:
- a light source for emitting light;
- a light splitting element for splitting light by transmitting or reflecting part of the light emitted from the light source;
- a light receiving element for receiving the transmission light or reflection light split by the light splitting element;
- a condensing lens, disposed between the light splitting element and the light receiving element, for guiding the transmission light or reflection light split by the light splitting element to the light receiving element;
- a mounting base for mounting the condensing lens,
- wherein two long grooves are formed on the mounting base so as to face the condensing lens and cross at right angles.
3 more elements
An optical apparatus comprising:
- a light source for emitting light;
- a light splitting element for splitting light by transmitting or reflecting part of the light emitted from the light source;
- a light receiving element for receiving the transmission light or reflection light split by the light splitting element;
- a condensing lens, disposed between the light splitting element and the light receiving element, for guiding the transmission light or reflection light by the light splitting element to the light receiving element;
- a mounting base for mounting the condensing lens;
- and
- a protruding piece on the condensing lens,
- wherein a through hole that faces the condensing lens and pierces the mounting base in a direction perpendicular to a central axis of the condensing lens, is formed in the mounting base, wherein the condensing lens and the mounting base are placed so that the protruding piece formed on the condensing lens passes through the through hole of the mounting base, and
- an extension length of the protruding piece is more than thickness of the mounting base in a direction where the through hole pierces.
6 more elements
A light amount adjusting method of an optical apparatus including a light source for emitting light;
- a light splitting element for splitting light by transmitting or reflecting part of light emitted from the light source;
- a light receiving element for receiving the transmission light or reflection light split by the light splitting element;
- a condensing lens, disposed between the light splitting element and the light receiving element, for guiding the transmission light or reflection light split by the light splitting element to the light receiving element;
- a protruding piece formed so as to protrude from the condensing lens in a direction perpendicular to a central axis of the condensing lens and extend like a rod;
- and a mounting base for mounting a condensing lens, the method comprising:
- grasping the protruding piece formed on the condensing lens;
- and
- moving the condensing lens in a direction parallel to an axis of light entering the condensing lens, to adjust an amount of light entering the light receiving element.
5 more elements
A light amount adjusting method of an optical apparatus including a light source for emitting light;
- a light spitting element for splitting light by transmitting or reflecting part of light emitted from the light source;
- a light receiving element for receiving the transmission light or reflection light split by the light splitting element;
- a condensing lens, disposed between the light splitting element and the light receiving element, for guiding the transmission light or reflection light split by the light splitting element to the light receiving element;
- a protruding piece formed so as to protrude from the condensing lens in a direction perpendicular to a central axis of the condensing lens and extend like as rod;
- and amounting the condensing lens, the method comprising:
- grasping the protruding piece formed on the condensing lens;
- and
- moving the condensing lens in a direction parallel to a surface of the mounting base where the condensing lens is mounted and in a direction perpendicular to an axis of light entering the condensing lens, to adjust an amount of light entering the light receiving element.
5 more elements
A light amount adjusting method of an optical apparatus including a light source for emitting light;
- a light spitting element for splitting light by transmitting or reflecting part of light emitted from the light source;
- a light receiving element for receiving the transmission light or reflection light split by the light splitting element;
- a condensing lens, disposed between the light splitting element and the light receiving element, for guiding the transmission light or reflection light split by the light splitting element to the light receiving element;
- a protruding piece formed so as to protrude from the condensing lens in a direction perpendicular to a central axis of the condensing lens and extend like a rod;
- and amounting base for mounting the condensing lens, the method comprising:
- grasping the protruding piece formed on the condensing lens;
- and
- moving the condensing lens in a direction perpendicular to a surface of the mounting base where the condensing lens is mounted, to adjust an amount of light entering the light receiving element.
5 more elements
A light amount adjusting method of an optical apparatus including a light source for emitting light;
- a light splitting element for splitting light by transmitting or reflecting part of light emitted from the light source;
- a light receiving element for receiving the transmission light or reflection light split by the light splitting element;
- a condensing lens, disposed between the light splitting element and the light receiving element, for guiding the transmission light or reflection light split by the light splitting element to the light receiving element;
- a protruding piece formed so as to protrude from the condensing lens in a direction perpendicular to a central axis of the condensing lens and extend like a rod;
- and amounting base for mounting the condensing lens,
- the protruding piece being formed in a position away from the central axis of the condensing lens in a direction perpendicular to the central axis thereof, and
- the condensing lens being disposed so as to be angularly displaced about an axial line of the protruding piece, the method comprising:
- grasping the protruding piece formed on the condensing lens;
- and
- causing the condensing lens to perform an angular displacement about the axial line of the protruding piece, to adjust an amount of light entering the light receiving element.
7 more elements
Dependencies are inferred from the claim text.