JPH027550U

JPH027550U -

Info

Publication number: JPH027550U
Application number: JP8598888U
Authority: JP
Priority date: 1988-06-29
Filing date: 1988-06-29
Publication date: 1990-01-18

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す縦断面図、第
２図は第１図のリング光センサー群を示す部分正
面図で、同図Ａ，Ｂはそれぞれ第１、第２のリン
グ光センサー群を示す。第３図は公知のレーザー
回折式粒度分布測定装置を示す縦断面図、第４図
は第３図装置の原理を示す説明図で、同図Ａは粒
子の大きさと光環の直径との関係を、同図Ｂはリ
ング光センサーの形状をそれぞれ示す。１……ハーフミラー、２……第１のリング光セ
ンサー群、３……奇数番目リング光センサー、４
……第２のリング光センサー群、５……偶数番目
リング光センサー、６……空白部分、７，７ａ…
…すきま、０８……レーザー、０９……光、０１
０……レンズ、０１１……コリメーターレンズ、
０１２……平行レーザー光、０１３……粒子、０
１４……回折光、０１５……集光レンズ、ａ……
粒径。 Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a partial front view showing the ring light sensor group of Fig. 1, and A and B in the same figure are the first and second ring light sensors, respectively. The sensor group is shown. Figure 3 is a vertical cross-sectional view showing a known laser diffraction particle size distribution measuring device, Figure 4 is an explanatory diagram showing the principle of the device shown in Figure 3, and Figure A shows the relationship between the particle size and the diameter of the optical ring. , and Figure B show the shapes of the ring optical sensors, respectively. 1... Half mirror, 2... First ring light sensor group, 3... Odd numbered ring light sensor, 4
...Second ring light sensor group, 5...Even numbered ring light sensor, 6...Blank area, 7, 7a...
...Gap, 08...Laser, 09...Light, 01
0...lens, 011...collimator lens,
012...Parallel laser beam, 013...Particle, 0
14... Diffracted light, 015... Condensing lens, a...
Particle size.

Claims

[Scope of utility model registration request]

From the diameter and light intensity distribution of the light ring obtained by irradiating a group of particles to be measured with parallel laser light and focusing the diffracted light on a group of concentric ring optical sensors installed at its focal plane using a condensing lens. In the particle size distribution measuring device for determining the particle size distribution of the particle group, a half mirror is installed diagonally between the condenser lens and the focal point, and an odd number of the concentric ring optical sensors installed at the focal plane. a first ring optical sensor group in which only ring optical sensors are arranged concentrically, and an even-numbered ring optical sensor group in the concentric ring optical sensor group installed at a conjugate position with respect to the half mirror of the first ring optical sensor group; A particle size distribution measuring device comprising: a second ring optical sensor group in which only ring optical sensors are arranged concentrically.