Fig. 1. Schematic of laser tracing measurement optical system based on dual-wavelength method to compensate air refractive index

Fig. 2. Specific modeling process of laser tracing measurement optical system based on dual-wavelength method to compensate air refractive index

Fig. 3. Simulation structure diagram of laser tracing measurement optical system for compensating air refractive index based on dual-wavelength method

Fig. 4. Simulation interferogram of laser tracking measurement optical system based on dual-wavelength method for compensating air refractive index. (a) Interference signal obtained by laser1; (b) interference signal obtained by laser2

Fig. 5. Comparison of displacement and ideal values of cat's eye reflector measured by single-wavelength system and dual-wavelength system

Fig. 6. Relative error diagram of displacement and ideal value of cat's eye reflector measured by single-wavelength system and dual-wavelength system

Fig. 7. Effect of non-ideal PBS performance on visibility of fringe pattern. (a) Non-ideal p-light transmittance; (b) non-ideal s-light reflectance

Fig. 8. Effect of non-ideal PBS transmittance on optical system energy at different locations