| 摘要 |
PROBLEM TO BE SOLVED: To provide an illuminating device, an optical filter, and an illuminating system that can cope with various environments.SOLUTION: An illuminating system according to an embodiment includes an illuminating device and an optical filter. The illuminating device includes first to third laser elements. The first to third laser elements emit first to third laser beams having first to third peak wavelengths and full widths at half maximum of 5 nm or less respectively. The optical filter includes a first filter element. The first filter element has first to third transmission wavelength regions having first to third bottom transmission wavelengths and full widths at half maximum of 5 nm or less. Absolute values of differences between the first to third bottom transmission wavelengths and the first to third peak wavelengths are 5 nm or less.SELECTED DRAWING: Figure 1 |
