| 主权项 |
1. A lighting apparatus comprising:
a light source unit provided with a first light source for emitting first light and a second light source for emitting second light in a wavelength band different from the first light; a light-receiving unit provided with first light-receiving sensitivity to the first light and second light-receiving sensitivity, different from the first light-receiving sensitivity, to the second light and configured to output a first light detection signal having strength corresponding to the first light-receiving sensitivity and an incident light quantity of the first light when the first light is inputted and output a second light detection signal having strength corresponding to the second light-receiving sensitivity and an incident light quantity of the second light when the second light is inputted; a calculation unit configured to generate a first multiplication signal by multiplying the first light detection signal by a first coefficient and generate a second multiplication signal obtained by multiplying the second light detection signal by a second coefficient, where the first coefficient and the second coefficient are set such that a multiplication result of the first light-receiving sensitivity and the first coefficient is equal to a multiplication result of the second light-receiving sensitivity and the second coefficient; and a control unit configured to control the light source unit so as to decrease a light quantity, based on the first multiplication signal or the second multiplication signal generated by the calculation unit. |
