3 results about "Airy disk" patented technology

The invention discloses an intermediate infrared star light interference fringe generation and aberration suppression evaluation system and method based on 4F system spatial filtering. The system is applied to coherent interference measurement of mid-infrared band fixed star light in astronomical observation. The system comprises a telescope collimation unit, an aberration equivalent unit, a 4F relay light path unit, an adjustable pinhole spatial filtering unit arranged on a 4F middle focal plane, a reference light generation and phase tilt modulation unit and a coherent superposition and interferogram output unit. By arranging the pinhole, the wavefront high-spatial-frequency component of the test arm is cut, so that the influence of atmospheric turbulence or high-order aberration on interference fringes is reduced, and the regularity of the fringes is improved. The system further provides a parameterization strategy for setting the pinhole size with the Airy spot radius as a scale, and interference fringes under different pinhole multiplying power can be subjected to comparative analysis and wavefront diagram PV value calculation. The method is suitable for the scenes of intermediate infrared coherent imaging, wavefront shaping, spatial filtering teaching demonstration and the like.

In one embodiment, a method includes accessing an image captured by an imaging system that includes an aperture and an optical sensor, wherein the imaging system blurs the image; and de-blurring the image by applying an Airy-disk correction that attributes at least part of the blurring in the image to a circular aperture rather than to a pinhole aperture.

The application discloses an exposure writing field splicing method of an electron beam spherical grating, and the splicing process comprises the following steps: calculating the writing field size; calculating the writing field splicing interval of the spherical grating; focusing on a spherical reference point and locally exposing; identifying the writing field splicing error; adjusting and controlling the writing field splicing error; modifying and compensating the consistency of the writing field pattern of each region of the spherical grating; and exposing by the electron beam after converting the error of the whole region writing field. The exposure writing field splicing method of the electron beam spherical grating provided by the application guarantees the consistency of the writing field splicing and the pattern of each region of the spherical grating, reduces the surface roughness of the electron beam spherical grating, avoids the appearance of the secondary peak of the imaging Airy disk caused by the splicing error, and guarantees the imaging quality and the spectral resolution of the spectral instrument.