OPTICAL UNIT
The present invention provides an optical unit capable of suppressing a thermal influence on the optical element even if a heating source such as a laser driver is disposed near the optical element. A light pickup unit 9 of the present invention includes a beam splitter 12 and a collimate lens 13 at locations opposed to a laser driver 17. In a space 24 formed by the laser driver 17, the beam splitter 12 and the collimate lens 13, a thermal insulation sheet 18 is provided on the side of the laser driver 17, and a thermal conductive sheet 19 is provided on the side of the beam splitter 12 and the collimate lens 13.
1 . An optical unit having an optical element at a location opposed to a heating source, wherein in an opposing space formed by said heating source and said optical element, a thermal insulator is provided on the side of said heating source or said optical element, and a thermal conductive material is provided on the side of said optical element or said heating source.
2 . An optical unit wherein an optical element is provided in a recess formed in a base which receives heat from a heating source, and a thermal conductive material lies astride between at least one end of an opening edge of said recess and the other end which is opposed to the one end.
3 . An optical unit wherein a heating source provided adjacent to an optical element is fixed to a board located on the opposite side from said optical element, an opening for radiating heat generated by said heating source is formed in said board, and a thermal conductive material for transmitting heat to the opposite side from said heating source with respect to said board is disposed in said opening.