LIGHTING DEVICE AND OPTICAL MEMBER

Title:

LIGHTING DEVICE AND OPTICAL MEMBER

Document Type and Number:

WIPO Patent Application WO/2016/175214

Kind Code:

A1

Abstract:

[Problem] To provide a lighting device and an optical member, which are capable of collecting light emitted from a light source, and irradiating light that is parallel to an optical axis or light having an illuminance inversely proportional to the second power of the distance, even in the cases where there are restrictions in design. [Solution] An LED lighting device 100 is provided with: an LED element 1; and an optical member 130 that has a first beam shaping lens section 131, which outputs narrow-angle light by shaping a center luminous flux lc outputted from the LED element 1, and a second beam shaping lens section 132, which outputs narrow-angle light by shaping a peripheral luminous flux lo. The second beam shaping lens section 132 of the optical member 130 has a reflecting surface 132c and an output surface 132d,the reflecting surface 132c is designed under the restrictions where the maximum outer diameter D4 of the optical member 130 is smaller than a predetermined diameter, and the length L0 in the optical axis direction is longer than a predetermined length, and the output surface 132d is designed so as to refract the peripheral luminous flux lo such that the peripheral luminous flux is parallel to the optical axis 110a or inclined to the side opposite to the optical axis 110a, said peripheral luminous flux having been inclined to the optical axis 110a side by being reflected by the reflecting surface 132c.

More Like This:

JP2020181109	OPTICAL DEVICE
WO/2010/146895	ILLUMINATION DEVICE, DISPLAY DEVICE, AND TELEVISION RECEIVER
JP2016114659	ILLUMINATION LENS, IMAGE CAPTURING MODULE, AND ELECTRONIC DEVICE

Inventors:

IWASAKI MACHIKO (JP)

Application Number:

PCT/JP2016/063099

Publication Date:

November 03, 2016

Filing Date:

April 26, 2016

Export Citation:

Click for automatic bibliography generation Help

Assignee:

KOHA CO LTD (JP)

International Classes:

F21V5/00; F21S2/00; F21V5/04; G02B3/08; G02B13/00; F21Y115/10

Foreign References:

JP2014022077A	2014-02-03
JP2005229082A	2005-08-25
US7411742B1	2008-08-12