著者

三品 博達 朝倉 利光

出版者

公益社団法人 応用物理学会

雑誌

応用物理 (ISSN:03698009)

巻号頁・発行日

vol.42, no.6, pp.560-573, 1973-06-10 (Released:2009-02-09)

参考文献数

74

被引用文献数

1

---

As one of the most interesting applications of optical heterodyne detection in scientific measurements, various types of doppler velocimeters have been recently developed with the use of laser light. In this report, doppler velocimeters are classified into two groups of reference and self-comparison methods, each of which has two different systems of optical arrangement called as an alignment system and a self-alignment system. Various properties cl doppler velocimeters are discussed, such as measurements of a flow direction, three-dimensional measurements of a flow, and properties and processings of beat signals.

著者

今田 充一 湯浅 友典 相津 佳永 三品 博達

出版者

室蘭工業大学SVBL

雑誌

サテライト・ベンチャー・ビジネス・ラボラトリー年報

巻号頁・発行日

vol.6, pp.77-78, 2004

著者

猪股 正久 高木 徹 湯浅 友典 相津 佳永 三品 博達

出版者

室蘭工業大学SVBL

雑誌

サテライト・ベンチャー・ビジネス・ラボラトリー年報

巻号頁・発行日

vol.5, pp.65-66, 2003

著者

三品 博達 田中 恒雄

出版者

社団法人 日本印刷学会

雑誌

日本印刷学会論文集 (ISSN:00400874)

巻号頁・発行日

vol.21, no.1, pp.13-21, 1983

---

A New image modulation process for printing by means of laser speckle pattern is proposed and analysed theoretically by standing on optical and staitistical base. In this method, image plane laser speckle pattern is used for the modulation in a platemaking process instead of usual contact or glass screesn. It can be shown that the characteristics of image modulation in this process are closely related to the first order statistics of laser speckle which represent the intensity probability distribution function.<br>By considering the platemaking and printing process, the relation between the density of the original and printed image is obtained for various surface roughness and different parameters of optical system. As the results, the widest and most linear reproduction curve is given when the speckle pattern having the contrast value of 0.5 is used for image modulation. The screen range of speckle modulation depends strongly on the ratio of the threshold level of the sensitized plate to the average intensity level of the speckle pattern.

著者

三品 博達

出版者

公益社団法人 応用物理学会分科会 日本光学会

雑誌

光学 (ISSN:03896625)

巻号頁・発行日

vol.7, no.3, pp.93-102, 1978-06-25 (Released:2010-06-11)

参考文献数

63