Japan Atomic Energy Research Institute

Katsuaki Akaoka

Yoichiro Maruyama

Takashi Arisawa

Akira Ohzu

Masaaki Kato

A remote particle counter comprising a pulsed laser generator, laser light emitting optics, scattered light collecting optics, a high-sensitivity two-dimensional photo detector as a scattered light detecting portion having a fast gating capability such as a CCD camera, and a control and measure system, wherein suspended fine particles forming aerosols in the atmosphere which are far away from the site of laser emission are illuminated with laser light, the resulting backward scattered light from the individual fine particles is detected as image, and the number and size distribution of the suspended fine particles are measured at a remote site.

Remote particle counter for remote measurement of the number and size distribution of suspended fine particles in the atmosphere

The wavefront of laser light as it propagates through a medium is controlled so that not only the inherent aberrations in the wavefront of the laser light itself but also the aberrations that are progressively caused by passage of laser light through the medium are effectively corrected to achieve long-distance propagation of the laser light through the medium.

Growing community of inventors

Ibaraki, Japan

Katsuaki Akaoka