| 摘要 |
<p>PURPOSE: To obtain an optical projecting system where a complicated lens system is not required without using a schlieren bar by permitting first, second and third field lenses to collimate respective basic light beams in corresonding optical path adjustors and also re-condensing the respective basic light beams reflected from the respective optical path adjustors. CONSTITUTION: In the optical projecting system 200, the first, the second and the third field lenses 112, 113 and 114 are used, which are respectively positioned between a first two-color mirror 106 and the first optical path adjustor 108 consisting of a mobile mirror 111, between the second two-color mirror 107 and the second optical path adjustor 109 consisting of the mobilemirror 111 and between the second twocolor mirror 107 and theh third optical path adjustor 110 consisting of the mobile mirror 111. Thus, the divergence trend of the respective basic light beams is restricted and an optical flux diameter is reduced. Therefore, condensing is easily attained and necessity for using the complicated lens system is eliminated.</p> |
