LIGHT SOURCE APPARATUS AND PROJECTION SYSTEM
FIG4 is a schematic diagram showing a principle of an angle correction of a fly-eye lens pair
FIG4 is a schematic diagram showing a principle of an angle correction of a fly-eye lens pair, and the fly-eye lens pair has a good function of correcting the optical path. When the beam 1 is incident along an optical axis parallel with the fly-eye lens pair, the direction of the main optical axis of the emitted light remains unchanged and is still parallel with the optical axis of the fly-eye lens pair. When the beam 2 is incident at an angle α relative to the optical axis of the fly-eye lens pair, the main optical axis of the beam 2 of the emitted light is at an angle β with the optical axis of the fly-eye lens pair, α>β. That is, the fly-eye lens pair has a function of reducing an inclination angle of the beam. For example, when α is about 1° and β is about 0.2°, a magnitude of the angle β of the emitted light can be adjusted by adjusting a magnitude of α, and an adjustment accuracy is higher than an accuracy in the case where β is adjusted directly, such that a distance between an edge of the beam of the first exciting light L1 incident to the collecting lens 205 and the central axis of the collecting lens 205 can be as small as possible. In the practical application of the present disclosure, the distance between the edge of the beam of the first exciting light L1 incident to the collecting lens 205 and the central axis of the collecting lens 205 can be controlled to be within a range of 0.2 to 0.5 mm, thereby greatly improving the imaging quality of the light spot on the surface of the wavelength conversion device 206 and providing basic conditions for a subsequent uniform light distribution on an exiting surface of the entire light source device.
schematic diagram
201
first light source
202
fly-eye lens pair
209
1
Embodiment
206
wavelength conversion device
4
Embodiment
204
first light splitting assembly
205
collecting lens
212
integrator rod
207
relay lens
['1. A light source device, comprising a first light source, a fly-eye lens pair, a light guiding system, and a wavelength conversion device; wherein the first light source is configured to emit first exciting light which is homogenized by the fly-eye lens pair and then incident to the light guiding system; the light guiding system is configured to guide the first exciting light to the wavelength conversion device; the wavelength conversion device comprises a wavelength conversion section and a reflective section and periodically moves in such a manner that the wavelength conversion section and the reflective section are periodically located on an optical path of the first exciting light in different time divisions, wherein the wavelength conversion section absorbs the first exciting light and emits excited light, and the first exciting light is obliquely incident to a surface of the reflective section and is reflected to form second exciting light; the light guiding system is further configured to collect the excited light and the second exciting light, and to guide the excited light and the second exciting light to exit along an exiting light channel; the light guiding system comprises an optical path correcting assembly located on an optical path of the second exciting light and configured to reflect the second exciting light in such a manner that a main optical axis of the reflected second exciting light coincides with that of the excited light; and the fly-eye lens pair comprises a first lens array and a second lens array that are sequentially disposed along a direction of the first exciting light, wherein lens units constituting the first lens array are configured to perform imaging with overlap on a surface of the wavelength conversion device.', '3. The light source device according to claim 1, wherein the light guiding system further comprises a collecting lens for converging the first exciting light onto the wavelength conversion device and collecting the excited light and the second exciting light from the wavelength conversion device; and wherein a distance between an edge of a beam of the first exciting light incident to the collecting lens and a central axis of the collecting lens is in a range of 0.2 to 0.5 mm.']