Optical head and optical pickup device with a holder structure providing optical axis adjustment
First Claim
1. An optical head for irradiating an information storage medium with laser light from the laser diode to perform recording/reproduction of information comprising a laser holder retaining a laser diode, and a holder support retaining the laser holder, whereinthe laser holder is a frame structure that fixes the laser diode, having an abutment portion protruding from a base side of the frame structure,the holder support has a receiving surface that supports by abutment the abutment portion, and a through-hole that lets pass the laser light, andthe receiving surface is a plane approximately perpendicular to an optical axis of the optical head, the abutment portion being an arc surface having a central axis, which passes through an emission point of the laser diode and is perpendicular to the optical axis such that when rotating the laser holder to make an angular adjustment and simultaneously moving the laser holder along the receiving surface for a locational adjustment, the emission point is maintained along the optical axis.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical head comprises a laser holder retaining a laser diode, and a holder support retaining the laser holder, and irradiates an information storage medium with laser light from the laser diode to perform recording/reproduction of information. In this optical head, the laser holder is a frame structure that fixes the laser diode, having an abutment portion protruding from a base side of the frame structure. Also, the holder support has a receiving surface that supports by abutment the abutment portion, and a through-hole that lets pass the laser light. The receiving surface is a plane approximately perpendicular to an optical axis of the optical head, the abutment portion being made as an arc surface having a central axis that passes through an emission point of the laser diode and is perpendicular to the optical axis.
-
Citations
19 Claims
-
1. An optical head for irradiating an information storage medium with laser light from the laser diode to perform recording/reproduction of information comprising a laser holder retaining a laser diode, and a holder support retaining the laser holder, wherein
the laser holder is a frame structure that fixes the laser diode, having an abutment portion protruding from a base side of the frame structure, the holder support has a receiving surface that supports by abutment the abutment portion, and a through-hole that lets pass the laser light, and the receiving surface is a plane approximately perpendicular to an optical axis of the optical head, the abutment portion being an arc surface having a central axis, which passes through an emission point of the laser diode and is perpendicular to the optical axis such that when rotating the laser holder to make an angular adjustment and simultaneously moving the laser holder along the receiving surface for a locational adjustment, the emission point is maintained along the optical axis.
-
11. An optical head for irradiating an information storage medium with laser light from a laser diode along an optical axis to perform recording/reproduction of information comprising:
-
a laser holder retaining the laser diode, the laser holder having a frame structure having opposing base and head sides, the base side forming an abutment portion that is an arc surface having a central axis that passes through an emission point of the laser diode and is perpendicular to the optical axis, and the head side forming a vertex portion that is an arc surface having the same central axis; a holder support retaining the laser holder having a planar receiving surface that supports the abutment portion and defines a through-hole for light from the laser diode, the planar receiving surface being approximately perpendicular to the optical axis of the optical head; and a spring for pressing the vertex portion such that the abutment portion presses the receiving surface, wherein angular adjustment and locational adjustment of the laser holder occurs simultaneously by rotating the laser holder and moving the laser holder perpendicularly to the optical axis along the planar receiving surface, thereby maintaining the emission point along the optical axis. - View Dependent Claims (12, 13, 14, 15)
-
-
16. An optical head for irradiating an information storage medium with laser light from the laser diode to perform recording/reproduction of information comprising:
-
a laser holder retaining a laser diode, the laser holder being a frame structure that fixes the laser diode with an abutment portion protruding from a base side of the frame structure, the abutment portion being an arc surface having a central axis, which passes through an emission point of the laser diode and is perpendicular to the optical axis, and the laser holder having a vertex portion corresponding to the abutment portion at a head side opposing the base side; and a holder support retaining the laser holder and defining a through-hole that lets pass the laser light, the holder support having a receiving surface that supports by abutment the abutment portion, the receiving surface being a plane approximately perpendicular to an optical axis of the optical head, and the holder support having a leaf spring having an even pressure surface perpendicular to the optical axis for pressing the vertex portion in a direction in which the abutment portion presses the receiving surface, wherein the vertex portion is a protuberance made up by an arc surface centered about the central axis, and wherein angular adjustment and locational adjustment of the laser holder occurs simultaneously by rotating the laser holder and moving the laser holder perpendicularly to the optical axis along the planar receiving surface, thereby maintaining the emission point along the optical axis. - View Dependent Claims (17, 18, 19)
-
Specification