Shearing Interferometer

Test Aperture: Φ5mm Auxiliary Alignment Aperture: Φ30mm Reference Lens Surface Figure Accuracy: λ/20

As phone technology develops, camera holes in 3D and full-screen displays approach curved edges, producing transmitted-wavefront PV values much larger than those of 2D and 2.5D screens. Near these edges, dense interference fringes exceed the resolution of the preceding G10U-PH interferometer and mainstream G10-equivalent products, preventing accurate measurement. The G5U-PH laser interferometer is customized for 3D and full-screen camera-hole inspection, accurately measuring dense fringes and very large aberrations(PV). An imported He-Ne laser and standard air-float vibration-isolation platform provide stable, reliable testing on demanding production floors.

Laser Center Wavelength: 633nm Output Power: 2mw Coherence length: >50m

Because lasers have good coherence, measuring a plane-parallel optical element produces interference fringes between its front surface and the interferometer reference, between its rear surface and the reference, and between the front and rear surfaces themselves. These three fringe sets overlap, and conventional methods cannot directly analyze such an interferogram. A common approach is to coat the sample's rear surface with grease such as petroleum jelly. With a refractive index close to1.5, similar to most optical glasses, the grease acts like a roughened rear surface and removes unwanted rear-surface interference. However, it risks contaminating the sample and is ineffective for high-index optical glass. Multi-surface measurement technology (MST) provides a solution. It uses a wavelength-tunable laser: wavelength-induced phase shifts depend on cavity length, giving each fringe set from a plane-parallel optical element a unique cavity-length-related frequency. By analyzing a single acquired dataset, Shineoptics' multi-surface measurement algorithm independently separates the profiles of the parallel surfaces. A single measurement therefore directly yields three characteristics: front-surface figure, rear-surface figure, and optical-thickness variation.

Interferometer Aperture: 152mm Maximum Test Aperture: 300mm Light Source: Frequency-Stabilized Helium-Neon Laser

The name Guyu refers to rain nourishing the hundred grains: plentiful, timely rainfall allows grain crops to thrive. Amid unprecedented changes of the past century, Shineoptics named the new product Guyu to express its wish that the company's pioneering spirit and innovation would help Chinese optics overcome foreign product sales bans and achieve independence, and that the Guyu series would become a vital source of the company's continuing progress. The Guyu 300 spherical stitching laser interferometer, released by Shineoptics in 2022, is the first product in the Guyu series. The Guyu 300 uses an integrated air-float vibration-isolation structure. Computer software automatically plans the stitching scheme, and a computer-controlled 5-axis mechanism locates images and automatically performs stitching measurements. Dedicated Sirius stitching-interferometer software then processes the data for high-precision surface-figure error measurement. For applications including lithographic objectives and ultraviolet microscope objectives, the Guyu 300 helps customers measure full-size surface-figure errors of 300mm-aperture convex lenses, hemispherical lenses, and spherical lenses.