| 摘要 |
The present invention provides a transmission-type optical dust sensing device for sensing dust through a transmission method, measuring a part of incident light, reflecting a change in an incident light amount to a measurement value, and obtaining a more precise measurement result. The transmission-type optical dust sensing device according to the present invention comprises: a case; a light-emitting unit installed in one side in the case, and irradiating light; a beam splitter installed in the case with an interval between the light-emitting unit and the same, reflecting a part of light irradiated from the light-emitting unit, and transmitting remaining light; an adjusting light receiving unit installed in the case at an angle with respect to the light-emitting unit, and sensing light reflected from the beam splitter; a light collecting lens installed in the case, and colleting light transmitted through the beam splitter; and a measuring light receiving unit installed in the case in an opposite side on a line of the light-emitting unit to be farther than a focal distance of the light collecting lens, and sensing light passing through the light collecting lens. |
