FIELD: lighting.
SUBSTANCE: lighting device includes a light-emitting diode, a unit of converging lenses, on which is incident light from light-emitting diode, and a polarisation conversion element. Lens which forms a light output surface in converging lenses is an aspherical lens having an axially symmetrical shape and section of aspherical shape in cross section plane parallel to optical axis. Light output surface of aspherical lens has a function of collimating and subsequent emission of light emitted from centre light-emitting diode, in a region closer to optical axis, and emitting light so that it converges to optical axis in region, further from optical axis.
EFFECT: technical result is providing uniformity of illumination of polarisation conversion element.
7 cl, 12 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| LIGHTING DEVICE AND PROJECTOR | 2014 |
|
RU2642899C2 |
| PROJECTOR | 2012 |
|
RU2549910C1 |
| HELMET-MOUNTED WIDE-ANGLE COLLIMATING OPTICAL DISPLAY SYSTEM | 2015 |
|
RU2586097C1 |
| PROJECTION DEVICE | 2011 |
|
RU2544883C2 |
| OPTICAL SCANNING UNIT, IMAGE PROJECTOR HAVING SAID UNIT, CAR DISPLAY DEVICE ON WINDSCREEN AND MOBILE TELEPHONE | 2009 |
|
RU2464603C1 |
| COMPACT VIRTUAL DISPLAY | 2008 |
|
RU2427015C2 |
| DEVICE FOR EMITTING POLARISED LIGHT | 2008 |
|
RU2479071C2 |
| OPTICAL SYSTEM | 2006 |
|
RU2419741C2 |
| IMAGE DISPLAY DEVICE AND METHOD FOR CONTROLLING IMAGE DISPLAY DEVICE | 2014 |
|
RU2629889C1 |
| INPUT/OUTPUT LENS, ILLUMINATION DEVICE AND ELECTRONIC DEVICE | 2009 |
|
RU2473933C1 |
