light flux meter [光] 光通量计
total light flux [光] 总光通量
light flux ratio [光] 光通量比
nominal light flux 额定光通量
regulates the retinal light flux 调节视网膜光通量
weak light flux 弱光通量
light flux sensitivity [光] 光束灵敏度
output light flux 输出光通量
The CCD unit (33) receives the light flux passing through the third lens group (G3).
CCD单元（33）接受通过了第三透镜组（G3）的 光束。
The present invention adopts a reflective cup as an LED light flux collecting device.
本发明采用反光杯作为LED光通量收集装置。
The first lens group (G1) receives a light flux entering along a first optical axis (A1).
第一透镜组(G1)取入沿第一光轴(A1)入射的光束。
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