Patent Number: 7,535,625

Title: Image recording apparatus

Abstract: A projection optical system has first to fourth lens groups (51) to (54) provided in this order from a SLM, a mirror (32) having an opening is provided between the first lens group (51) and the second lens group (52), and an aperture plate (132) is provided between the third lens group (53) and the fourth lens group (54). Zeroth order light which is signal light from the SLM passes through each opening of the mirror (32) and the aperture plate (132) to be guided to a recording medium, and a part of first order diffracted light is reflected by the mirror (32) to be guided outside and received by an external light-block water-cooling jacket. The rest of the first order diffracted light is blocked by the aperture plate (132), and heat generated by light blocking is removed by a cooling mechanism connected to the aperture plate (132).

Inventors: Kataoka; Yoshikazu (Kyoto, JP)

Assignee: Dainippon Screen Mfg. Co., Ltd.

International Classification: G02B 26/08 (20060101); B41J 27/00 (20060101); G02B 15/14 (20060101)

Expiration Date: 2021-05-19 0:00:00