Bi-focal positioning-free dual ellipsoid imaging device

Abstract

The invention provides a diafocal point positioning-free type dual-ellipsoid imaging device and belongs to the technical field of optical imaging. The imaging device comprises two sets of coaxially and oppositely arranged identical ellipsoidal reflecting systems. Each ellipsoidal reflecting system is composed of a fixed disc, an objective lens, an objective lens adaptor, an ellipsoidal reflecting mirror and a fixed sleeve, wherein the above parts are coaxially arranged. The fixed disc is arranged inside the fixed sleeve. The center of the fixed disc is provided with a threaded hole. The objective lens adaptor for fixing the objective lens is in threaded connection with the threaded hole. Through the rotation of the objective lens adaptor inside the threaded hole, the objective lens can move along an optical axis, so that the focal point of the objective lens coincides with the far focal point of the ellipsoidal reflecting mirror. The near focal point of the ellipsoidal reflecting mirror is simultaneously located on the end surface of the ellipsoidal reflecting mirror and the end surface of the fixed sleeve. According to the technical scheme of the invention, based on the design of a special mechanical structure, the spatial three-dimensional measurement step during the installing and adjusting process of the ellipsoidal reflecting mirror is avoided. meanwhile, the imaging device is simple to install and adjust, high in efficiency, and theoretically aberration-free.

Description

technical field

[0001] The invention relates to a dual-focus positioning-free dual ellipsoid imaging device, which belongs to the technical field of optical imaging. Background technique

[0002] With continuous breakthroughs and innovations in the field of life sciences, reflective microscopic imaging and lensless microscopic imaging systems have developed rapidly. The structures that can realize imaging under large numerical aperture angle are: parabolic mirror, hyperbolic mirror and ellipsoidal mirror. Ellipsoidal reflectors are widely used in the fields of optical microscopic imaging technology and optical precision measurement technology by virtue of the advantages of increasing numerical aperture and enhancing contrast.

[0003] Ellipsoidal mirrors are very sensitive to aberrations, which is an important feature of ellipsoidal mirrors. For this reason, ellipsoidal mirrors are usually used to detect aberrations. However, the ellipsoidal mirror has a large collection a...

Examples

specific Embodiment 1

[0031] The structure schematic diagram of the bifocal positioning-free dual ellipsoid imaging device of this embodiment is as follows figure 1 shown. The bifocal positioning-free dual ellipsoid imaging device includes two sets of identical ellipsoid reflective systems coaxially arranged oppositely, and the ellipsoid reflective system includes a coaxially arranged fixed disk 1, an objective lens 2, an objective lens adapter 3, The ellipsoid reflector 4 and the fixed sleeve 5; the fixed disk 1 is installed inside the fixed sleeve 5, and the center of the fixed disk 1 has a threaded hole, and the objective lens adapter 3 for fixing the objective lens 2 is threaded with the threaded hole Connect, by rotating in the threaded hole, realize that objective lens 2 moves on the optical axis, make objective lens 2 focal points coincide with the far focus of ellipsoidal reflector 4; The end face and the end face of the fixed sleeve 5.

specific Embodiment 2

[0032] The dual-focal positioning-free dual-ellipsoid imaging device of this embodiment, on the basis of the first embodiment, further defines that the distance between the two sets of ellipsoid reflector systems can be adjusted.

[0033] Such a structural design, first of all, does not limit the distance between the two sets of ellipsoid reflector systems, thus reducing the difficulty of installation and adjustment; secondly, because the distance between the two sets of ellipsoid reflector systems can be adjusted, it is convenient Optical devices, such as optical filters and diaphragms, are added between the reflective systems to facilitate the analysis and design of the subsequent optical path.

specific Embodiment 3

[0034] The double ellipsoid imaging device with dual focal points and positioning free of the present embodiment, on the basis of specific embodiment 1 or specific embodiment 2, further defines that the focal point of the objective lens 2 coincides with the far focal point of the ellipsoidal reflector 4, the adjustment steps and the judging method One of the following two methods:

[0035] method one:

[0036] Step a, place a point light source at the near focal point of the ellipsoidal reflector 4, and place an observation screen or an imaging device behind the objective lens 2;

[0037] Step b, screwing the objective lens adapter 3 to move the objective lens 2 on the optical axis;

[0038] Step c, when the light intensity of the circular spot on the observation screen or the imaging device is the maximum value, the focal point of the objective lens 2 coincides with the far focal point of the ellipsoidal reflector 4;

[0039] Method Two:

[0040] Step a, place a point ligh...

technical field

[0001] The invention relates to a dual-focus positioning-free dual ellipsoid imaging device, which belongs to the technical field of optical imaging. Background technique

[0002] With continuous breakthroughs and innovations in the field of life sciences, reflective microscopic imaging and lensless microscopic imaging systems have developed rapidly. The structures that can realize imaging under large numerical aperture angle are: parabolic mirror, hyperbolic mirror and ellipsoidal mirror. Ellipsoidal reflectors are widely used in the fields of optical microscopic imaging technology and optical precision measurement technology by virtue of the advantages of increasing numerical aperture and enhancing contrast.

[0003] Ellipsoidal mirrors are very sensitive to aberrations, which is an important feature of ellipsoidal mirrors. For this reason, ellipsoidal mirrors are usually used to detect aberrations. However, the ellipsoidal mirror has a large collection a...

Examples

specific Embodiment 1

[0031] The structure schematic diagram of the bifocal positioning-free dual ellipsoid imaging device of this embodiment is as follows figure 1 shown. The bifocal positioning-free dual ellipsoid imaging device includes two sets of identical ellipsoid reflective systems coaxially arranged oppositely, and the ellipsoid reflective system includes a coaxially arranged fixed disk 1, an objective lens 2, an objective lens adapter 3, The ellipsoid reflector 4 and the fixed sleeve 5; the fixed disk 1 is installed inside the fixed sleeve 5, and the center of the fixed disk 1 has a threaded hole, and the objective lens adapter 3 for fixing the objective lens 2 is threaded with the threaded hole Connect, by rotating in the threaded hole, realize that objective lens 2 moves on the optical axis, make objective lens 2 focal points coincide with the far focus of ellipsoidal reflector 4; The end face and the end face of the fixed sleeve 5.

specific Embodiment 2

[0032] The dual-focal positioning-free dual-ellipsoid imaging device of this embodiment, on the basis of the first embodiment, further defines that the distance between the two sets of ellipsoid reflector systems can be adjusted.

[0033] Such a structural design, first of all, does not limit the distance between the two sets of ellipsoid reflector systems, thus reducing the difficulty of installation and adjustment; secondly, because the distance between the two sets of ellipsoid reflector systems can be adjusted, it is convenient Optical devices, such as optical filters and diaphragms, are added between the reflective systems to facilitate the analysis and design of the subsequent optical path.

specific Embodiment 3

[0034] The double ellipsoid imaging device with dual focal points and positioning free of the present embodiment, on the basis of specific embodiment 1 or specific embodiment 2, further defines that the focal point of the objective lens 2 coincides with the far focal point of the ellipsoidal reflector 4, the adjustment steps and the judging method One of the following two methods:

[0035] method one:

[0036] Step a, place a point light source at the near focal point of the ellipsoidal reflector 4, and place an observation screen or an imaging device behind the objective lens 2;

[0037] Step b, screwing the objective lens adapter 3 to move the objective lens 2 on the optical axis;

[0038] Step c, when the light intensity of the circular spot on the observation screen or the imaging device is the maximum value, the focal point of the objective lens 2 coincides with the far focal point of the ellipsoidal reflector 4;

[0039] Method Two:

[0040] Step a, place a point ligh...

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