US 12,468,131 B2
Fly-eye lens group, light source device, and projection apparatus
Fei Hu, Shenzhen (CN); Chen Chen, Shenzhen (CN); Meini Mo, Shenzhen (CN); and Yi Li, Shenzhen (CN)
Assigned to APPOTRONICS CORPORATION LIMITED, Shenzhen (CN)
Filed by APPOTRONICS CORPORATION LIMITED, Shenzhen (CN)
Filed on Jul. 18, 2022, as Appl. No. 17/867,338.
Application 17/867,338 is a continuation of application No. PCT/CN2020/137116, filed on Dec. 17, 2020.
Claims priority of application No. 202010060197.3 (CN), filed on Jan. 19, 2020.
Prior Publication US 2022/0357561 A1, Nov. 10, 2022
Int. Cl. G03B 21/14 (2006.01); G02B 13/06 (2006.01)
CPC G02B 13/06 (2013.01) [G03B 21/14 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A light source device, comprising:
a light source configured to emit first excitation light;
a wavelength conversion device comprising a wavelength conversion section and a non-wavelength conversion section, wherein the wavelength conversion section absorbs the first excitation light and outputs excited light, and the non-wavelength conversion section acts on the first excitation light to output second excitation light;
a fly-eye lens group comprising a first fly-eye lens, a second fly-eye lens, and a third fly-eye lens, wherein the first fly-eye lens is parallel to the second fly-eye lens, the third fly-eye lens is perpendicular to the first fly-eye lens, the first fly-eye lens and the third fly-eye lens form a double fly-eye structure configured to homogenize the first excitation light emitted from the light source and output the homogenized first excitation light to the wavelength conversion device, the first fly-eye lens and the second fly-eye lens form another double fly-eye structure configured to homogenize the excited light and the second excitation light outputted from the wavelength conversion device; and
a light combination device configured to guide the first excitation light from the third fly-eye lens to the first fly-eye lens, so as to output the first excitation light to the wavelength conversion device, and further configured to guide the excited light and the second excitation light outputted from the wavelength conversion device and passing through the first fly-eye lens to the second fly-eye lens for output.