| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser ignition device having superior mountability, while restraining the distortion of an optical axis due to mechanical stress, thermal stress, formation of a deposit, and the like, thus capable of achieving a stable ignition. <P>SOLUTION: An exciting light induction optical element 21, a pulse light expansion optical element 15 and a pulse light concentration optical element 11 are respectively constituted by respective optical lenses adapted for respective applications and lens storing cabinets of approximately cylindrical shape, while at the tip end side or base end side of the optical elements disposal evasion regions (L<SB POS="POST">1</SB>, L<SB POS="POST">4</SB>) of housings 10, 20, optical elements storing spaces 101, 106, 201 are laid out as reference planes (S<SB POS="POST">1</SB>, S<SB POS="POST">2</SB>, S<SB POS="POST">3</SB>), whereas the respective optical elements 11, 15, 21 are elastically pressed against the reference planes (S<SB POS="POST">1</SB>, S<SB POS="POST">2</SB>, S<SB POS="POST">3</SB>). <P>COPYRIGHT: (C)2013,JPO&INPIT |
