JPH0449859U

JPH0449859U -

Info

Publication number: JPH0449859U
Application number: JP9263890U
Authority: JP
Priority date: 1990-09-03
Filing date: 1990-09-03
Publication date: 1992-04-27
Anticipated expiration: 2005-09-03
Also published as: JP2503175Y2

Description

[Brief explanation of the drawing]

第１図は本考案レーザー超音波斜角波発生用光
源の模式図、第２図は偏光分離素子の原理図、第
３図は各出射端の遅延時間の説明図である。第４
図は従来の斜角波発生用光源の模式図である。１……パルスレーザー、２……パルスレーザー
光、３……No.１半透明鏡、４……No.１偏光分離
素子、５……No.１鏡、６……No.２半透明鏡、７
……No.１レンズ、８……No.１遅延用光フアイバ
ー、９……No.２レンズ、１０……No.２偏光分離
素子、１１……No.２鏡、１２……No.３レンズ、
１３……No.２遅延用光フアイバー、１４……No.
４レンズ、１５……No.３偏光分離素子、１６…
…No.３鏡、Ｌ……No.１出射端、Ｍ……No.２出
射端、Ｎ……No.３出射端、Ｏ……No.４出射端。 FIG. 1 is a schematic diagram of the light source for generating a laser ultrasonic oblique wave according to the present invention, FIG. 2 is a principle diagram of a polarization separation element, and FIG. 3 is an explanatory diagram of delay times at each output end. Fourth
The figure is a schematic diagram of a conventional light source for generating oblique waves. 1...Pulsed laser, 2...Pulsed laser light, 3...No.1 semi-transparent mirror, 4...No.1 polarization separation element, 5...No.1 mirror, 6...No.2 semi-transparent mirror ,7
...No.1 lens, 8...No.1 delay optical fiber, 9...No.2 lens, 10...No.2 polarization separation element, 11...No.2 mirror, 12...No.3 lens,
13……No.2 Optical fiber for delay, 14……No.
4 lenses, 15... No. 3 polarization separation element, 16...
…No.3 mirror, L…No.1 output end, M…No.2 output end, N…No.3 output end, O…No.4 output end.

Claims

[Scope of utility model registration request]

No. placed on the optical path of the laser beam generated from the pulse laser and splitting the laser beam into two.
.1 semi-transparent mirror, a No. 1 polarization separation element that is placed on the transmitted optical path of the No. 1 semi-transparent mirror and separates the transmitted light into vertically polarized waves and horizontally polarized waves, and the above No. 1 polarization separation element. The No. 1 mirror guides the vertically polarized wave from the above to the No. 1 output end, and the horizontally polarized wave from the No. 1 polarization separation element is guided to the No. 2 mirror.
Receive through a semi-transparent mirror and give appropriate delay time No.2
A No. 1 delay optical fiber that guides the light to the No. 2 output end via a polarization separation element, and a No. 2 mirror that receives the reflected light from the No. 1 semitransparent mirror and gives an appropriate delay time different from the above delay time. The No. 2 delay optical fiber leads to the No. 3 output end, and the separated vertically polarized wave is placed at the output end of the No. 2 delay optical fiber and is guided to the No. 3 output end.
A No. 3 polarization splitting element leads the upstream of the delay optical fiber to the No. 2 semi-transparent mirror, and a vertically polarized light that passes through the No. 1 delay optical fiber and is reflected by the No. 2 polarization splitting element. A light source for generating a laser ultrasonic oblique wave, characterized by comprising a No. 3 mirror that leads to a No. 4 emission end.