Optical system. The IR and VIS beams were generated by a femtosecond laser (pulse duration τ=200 fs, repetition rate F = 76 MHz). BS, beam splitter; CAM, camera; GS, galvanometer scanners; IF, 940 nm bandpass filter; IL, illuminator; L, lens; LED, white light emitting diode; M, mirror; NDF, neutral density filter; NDV, neutral density gradient filter; OBJ, objective; PM, power meter. The pupil plane PP and retinal plane RP; and the conjugated planes (PP* and RP*) are indicated with blue and red ...