TY  - GEN
AU  - Wu,Hengyu
AU  - Cheng,Haobo
AU  - Feng,Yunpeng
TI  - Design of a free-form diffuser for the entrance optic to correct the cosine error in the photometer
SN  - 1539-4522
PY  - 2019///0911
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1364/AO.58.005029
ER  -