Hollow cube-corner prism optical delay line device with endogenous scale light source

Abstract

The invention relates to a hollow cube-corner prism optical delay line device with an endogenous scale light source. The hollow cube-corner prism optical delay line device comprises a scale light source, a photoelectric sensor, an optical fiber coupler, a wavelength division multiplexer, collimators Z1 and Z2, plane reflecting mirrors F1 and F2, polarization controllers P1 and P2, a single-mode optical fiber, a rotary disk, hollow cube-corner prisms and a motor, wherein a scale light source signal is divided into two paths of light signals by the optical fiber coupler; the first path of light signals passes through the polarization controller P1 and the collimator Z1, is emitted to the plane reflecting mirror F1, returns along the same road and is received by the photoelectric sensor; and the second path of light signals passes through the polarization controller P2, the wavelength division multiplexer and the collimator Z2, is emitted to the hollow cube-corner prisms which are uniformly distributed on the rotary disk along the circumference, is guided for 180 DEG and then emitted to the plane reflecting mirror F2 and returns along the same road, and a returned signal is received by the photoelectric sensor and interferes with the first path of signals. The hollow cube-corner prism optical delay line device is simple in installation process and high in measuring speed, and signal to noise ratio and measuring accuracy are improved.

Description

technical field

[0001] The invention relates to the field of optical instruments, in particular to ophthalmic optical equipment of optical delay lines, in particular to a hollow corner cube optical delay line device with an endogenous scale light source. Background technique

[0002] The optical delay line is an optical device that changes the optical path or phase. In the measuring instruments that use the principle of interference, the optical delay line needs to change the optical path or phase, so that the optical path of the measurement optical path and the optical path of the reference optical path meet the interference conditions. to complete the measurement. Most of the optical interferometry techniques that have appeared in recent years are based on the principle of broadband light interference, and can be roughly divided into two categories: one uses partial coherence interferometer (PCI), and the other uses low coherence reflectometry (Low Coherence Refl. ectomet...

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