| 摘要 |
For optical communications systems as well as for video or audio longplay apparatus (VLP/ALP), it is necessary that a semiconductor laser to be used therein is situated in an exact position (x, y) and at an exact distance (z) from a first optical element (for example, a lens) of the optical system coupled to the laser. This is achieved in accordance with the invention by arranging the laser (35) in a bush-shaped cover (33) on which a flange (61) is formed. On this flange (61) a holder (37) with a lens (39b) is secured by way of a plastic metal solder layer (59). The lens can be placed in the correct position and at a correct distance from the laser (35) by sliding the holder (37) and by pressing on the holder, the solder layer (59) then being plastically deformed whilst the space in which the laser is accommodated still remains hermetically sealed. |
