light-receiving surface; photosensitive surface
Technical term used in optics, electronics, and solar energy contexts for the surface that captures light.
ソーラーパネルの受光面を南に向けて設置した。
We installed the solar panel with its light-receiving surface facing south.
このセンサーは受光面に当たる光の強さを測定します。
This sensor measures the intensity of light hitting its photosensitive surface.
Compound of 受光 (jukō, 'light reception') + 面 (men, 'surface').