FIS4+SLM powerful combination: an efficient solution for high-precision wavefront detection and control

In the fields of adaptive optics, laser shaping, holographic imaging and so on, the cooperation of spatial light modulator (SLM) and wavefront sensor is very important. In August 2025, FIS4 wavefront sensor and SLM (spatial light modulator) have been verified on the ground for more than two years to achieve perfect cooperation, and the whole process of closed-loop control from wavefront detection to real-time correction!

01 Optical path construction: the golden combination of fis4 and SLM

Laser: emission light source, spectrum purification by wave filter

Beam expansion system: collimating beam expansion to ensure beam uniformity

Spectroscope: half mirror and half lens guide the beam into SLM system

SLM modulation: loading phase diagram and regulating wavefront distribution

Fis4 detection: the reflected light path is received by FIS4 wavefront sensor and forms a four wave shear interferogram. The wavefront detection data to be measured is obtained by adjusting the interference diagram through software, and 64 Zernike polynomial data can be output.

02 Core advantage: how does FIS4 enable SLM system?

✅ Ultra high precision wavefront analysis

 64 Zernike Polynomials: comprehensive analysis of aberrations, guidance of SLM phase optimization real time data output: 10Hz refresh rate, dynamic tracking of wavefront changes

✅ Full parameter visualization of light

 intensity distribution: positioning the uneven response of SLM pixels wavefront gradient: visually displaying the source of phase distortion psf/mtf: quantitative evaluation of SLM modulated imaging quality

✅ The detection data of closed-loop correction

FIS4 wavefront sensor is fed back to SLM control software in real time to automatically iterate and optimize the phase diagram until the wavefront meets the standard.

03 typical application scenarios

✅ Adaptive optics telescope: correction of atmospheric turbulence aberrations biological microscopic imaging: compensation of refractive index inhomogeneity of samples

✅ Topological charge detection of laser beam shaping: accurate measurement of orbital angular momentum of vortex beam flat top light generation: verification of beam uniformity through MTF curve

✅ Holographic projection optimization astigmatism correction: using Zernike coefficient z5/z6 to optimize hologram diffraction efficiency analysis: combined with PSD to evaluate noise impact

The cooperation between fis4 wavefront sensor and SLM installs 'intelligent navigation' for the optical system, making the wavefront regulation from experience to data-driven.

Jinnaike optoelectronics and Yucheng optical sensor will continue to expand the wavelength coverage and technical boundary of fis4 four wave interference sensor, and provide more flexible detection solutions for customers in semiconductor, aerospace, biomedicine and other fields. We sincerely invite global partners to inquire and jointly explore the infinite possibilities of precision manufacturing! For more information, please visit the official website and contact customer service or sales consultants. We hope to build a better and faster use experience for you.