Objective lens mount for optical disc player
First Claim
1. A playback apparatus that directs a light beam against a record medium surface for optically reading information recorded in a track on such surface comprising;
- an objective lens assembly including lens means interposed in the path of said light beam for focusing the latter substantially at said record medium surface, a tubular lens mounting member through which said path extends longitudinally and having said lens means mounted at one end of said mounting member with an optical axis of said lens means coinciding substantially with said path of the light beam therethrough, a support member extending about said mounting member, metallic leaf spring means extending between the other end of said tubular mounting member and said support member for longitudinal movements of said mounting member in the direction of said optical axis and for swinging movements of said mounting member about a center in said other end, and a substantially bulky elastic body of foamed synthetic resin interposed between said support member and said tubular mounting member at a location along the latter spaced from said other end for further supporting said mounting member in respect to said longitudinal and swinging movements relative to said support member.
1 Assignment
0 Petitions
Accused Products
Abstract
In an optical disc player or other apparatus in which a light beam is directed through an objective lens to be focused thereby at a record medium surface for optically reading information recorded in a track on such surface, the lens is mounted in one end of a tubular mounting member through which the path of the light beam extends longitudinally, a support member extends about the tubular mounting member, a leaf spring member, preferably of amorphous metal, extends between the other end of the tubular mounting member and the support member to permit longitudinal movements of the mounting member for correcting focusing errors, and further to permit swinging movements of the mounting member about a center located at such other end for correcting tracking and/or time base errors, and a body of substantially bulky elastic material, such as, polyurethane foam, is interposed between the support member and the tubular mounting member at a location along the latter intermediate its ends for further supporting the tubular mounting member in respect to its longitudinal and swinging movements relative to the support member.
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Citations
15 Claims
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1. A playback apparatus that directs a light beam against a record medium surface for optically reading information recorded in a track on such surface comprising;
- an objective lens assembly including lens means interposed in the path of said light beam for focusing the latter substantially at said record medium surface, a tubular lens mounting member through which said path extends longitudinally and having said lens means mounted at one end of said mounting member with an optical axis of said lens means coinciding substantially with said path of the light beam therethrough, a support member extending about said mounting member, metallic leaf spring means extending between the other end of said tubular mounting member and said support member for longitudinal movements of said mounting member in the direction of said optical axis and for swinging movements of said mounting member about a center in said other end, and a substantially bulky elastic body of foamed synthetic resin interposed between said support member and said tubular mounting member at a location along the latter spaced from said other end for further supporting said mounting member in respect to said longitudinal and swinging movements relative to said support member.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
Specification