Industry Patents

A light source device incudes a first light source module configured to emit first light having a wavelength in a first spectral range, a second light source module configured to emit polychromatic light comprising second light having a wavelength in a second spectral range and third light having a wavelength in a third spectral range, a third light source module configured to emit fourth light in the second spectral range, a first filter configured to transmit the first light and the third light, reflect the second light, and reflect the fourth light to a light exit to be outputted, and a second filter configured to transmit the third light and the fourth light, and reflect the first light to the light exit to be outputted. The first light source module is provided with a first isolation device for preventing the second light from entering the first light source module.