Filter Modul mit scheibenförmigem abstimmbarem optischen Filter

申请公布号：DE69825798(D1)

申请号：DE1998625798

申请日期：1998.10.19

申请公布日期：2004.09.23

申请人：

NIPPON TELEGRAPH AND TELEPHONE CORP., TOKIO/TOKYO

发明人：KATAGIRI, YOSHITADA;TACHIKAWA, YOSHIAKI;NAGAOKA, SHINJI;OHIRA, FUMIKAZU;AIDA, KAZUO;SUZUKI, KEN-ICHI;ABE, HIROSHI;KAWAI, SHINGO;OBARA, HITOSHI

分类号：G02B6/34;G02B7/00;G02B26/00;G02B27/44;(IPC1-7):G02B5/20;G02B5/22;G02B5/28

主分类号：G02B6/34

摘要：<p>A reference wavelength light generation apparatus, comprising: a single mode wavelength tunable semiconductor laser light source; a disk shaped optical filter having such a filter characteristic that a transmission central wavelength varies linearly with respect to a rotation angle, through which optical beams from the light source pass; and a servo motor for rotating the disk shaped optical filter in synchronization with a clock; and a control circuit for detecting an error between an oscillation wavelength of the light source and a specified wavelength, and generating a negative feed-back control signal to control the light source so as to cancel out the error. <IMAGE></p>

钟(留声机型)

瓶

食品包装袋(旌什牌奶糖)

戒指(9)

包装袋(好运夹心饼)

工艺铃铛（105）

扬声器

包装箱

食品包装袋(1)

戒指(52)

戒指(17)

标贴（佳隆玉米粳）

标贴(8)

卫生巾包装袋(莉雅)

药品包装盒

包装盒(净水矿化器)

滤水器

工艺品

包装袋(豆丁)

陶瓷工艺品(大熊抱小熊101)