CN112305703A - Long-focal-length multi-focal-point system - Google Patents
Long-focal-length multi-focal-point system Download PDFInfo
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- CN112305703A CN112305703A CN202011350076.9A CN202011350076A CN112305703A CN 112305703 A CN112305703 A CN 112305703A CN 202011350076 A CN202011350076 A CN 202011350076A CN 112305703 A CN112305703 A CN 112305703A
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- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 238000003384 imaging method Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 101100518501 Mus musculus Spp1 gene Proteins 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Abstract
The invention discloses a multifocal system with long focal length, which comprises a left convex lens and a right convex lens which are arranged in parallel, wherein the distance between the left convex lens and the right convex lens is d, the radius of a lens of the left convex lens is R, the aperture at the center is R1, and the optical center is O1The radius of the right convex lens is R3, and the optical center is O2The parallel light rays pass through a hole in the center of the left convex lens and are focused by the right convex lens to form a focus S3; the parallel light rays are focused by the left convex lens and spread from two sides of the right convex lens to form a focus S2; a part of the parallel light rays focused by the left convex lens are focused by the right convex lens to form a focus S1 closest to the left convex lens
，R>R2>R3>R1Wherein f is4Is the optical center O of the left convex lens1The distance between the focus S2 and the focal point S2 can effectively improve the focal length, control the distance between the focal points and be widely applied to more fields.
Description
Technical Field
The invention relates to a multi-focus system, in particular to a multi-focus system with a long focal length.
Background
An existing multi-focus system is composed of two convex lenses, the two convex lenses form three focuses, but the focal length of light focused by the two convex lenses is short, so that the three focuses are difficult to keep a small distance, the cutting of a large object with the same volume as a crystal is not facilitated, and the application range of the multi-focus system is greatly limited.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a multi-focus system with wide application range and long focal length.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the multifocal system with long focal length comprises a left convex lens and a right convex lens which are arranged in parallel, wherein the distance between the left convex lens and the right convex lens is d, the radius of a lens of the left convex lens is R, the aperture at the center is R1, and the optical center is O1The radius of the lens of the right convex lens is R3, and the optical center is O2；
Parallel light rays pass through a hole in the center of the left convex lens and are focused by the right convex lens to form a focus S3;
parallel light rays are focused by the left convex lens and spread from two sides of the right convex lens to form a focus S2;
a part of the parallel light rays focused by the left convex lens are focused by the right convex lens to form a focus S1 closest to the left convex lens
R>R2>R3>R1Wherein f is4Is the optical center O of the left convex lens1And the focal point S2.
The distance from the focus S1 to the point O1 is L1, the distance from the focus S2 to the point O1 is L2, and the distance from the focus S3 to the point O1 is L3;
the focal length of the left convex lens is f1The focal length of the right convex lens is f2；
Focus S1 to O1The distance L2 between the points is equal to the focal length f of the left convex lens1I.e. L2 ═ f1At the same time, the focus S2 goes to the optical center O1Distance of points L2 ═ f2+d；
The object distance between the focus S1 and the right convex lens is L1 ═ f1-d) the formula of the imaging law of the convex lens is
Where f is the focal length of the lens, u is the object distance, v is the image distance, and for focal point S1, u ═ f1-d)，f＝f2Substituting the formula of the imaging rule of the convex lens to obtain:
focal length of focus S1
Focus S1 with respect to O1Distance of points L3 ═ f3+ d, can be obtained
The invention has the beneficial effects that: the invention can effectively improve the focal length, control the distance between the focuses and be widely applied to more fields.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is one of the structural schematic diagrams of the present invention
Fig. 2 is a second schematic diagram of the structure of the present invention.
Detailed Description
Referring to fig. 1 and 2, a multifocal system with a long focal length comprises a left convex lens 1 and a right convex lens 2 which are made of the same material and arranged in parallel, wherein the distance between the left convex lens 1 and the right convex lens 2 is d, the radius of a lens of the left convex lens 1 is R, the aperture at the center is R1, and the optical center is O1The thickness of the center of the lens is d1, the radius of the right convex lens 2 is R3, the thickness of the center of the lens is d2, and the optical center is O2；
Parallel light rays pass through a hole in the center of the left convex lens 1 and are focused by the right convex lens 2 to form a focus S3;
parallel light rays are focused by the left convex lens 1 and spread from two sides of the right convex lens 2 to form a focus S2;
a part of the parallel light rays focused by the left convex lens 1 are focused by the right convex lens 2 to form a focus S1 closest to the left convex lens
R>R2>R3>R1Wherein f is4Is the optical center O of the left convex lens 11And the focal point S2.
The invention can effectively improve the focal length, control the distance between the focuses, is beneficial to cutting crystals and can be widely applied to more fields, such as the invention is used for cutting objects with larger volume.
The distance from the focus S1 to the point O1 is L1, the distance from the focus S2 to the point O1 is L2, and the distance from the focus S3 to the point O1 is L3;
the focal length of the left convex lens 1 is f1SaidThe right convex lens 2 has a focal length f2；
Focus S1 to O1The distance L2 between the points is equal to the focal length f of the left convex lens 11I.e. L2 ═ f1At the same time, the focus S2 goes to the optical center O1Distance of points L2 ═ f2+d；
The object distance between the focus S1 and the right convex lens 2 is L1 ═ f1-d) the formula of the imaging law of the convex lens is
Where f is the focal length of the lens, u is the object distance, v is the image distance, and for focal point S1, u ═ f1-d)，f＝f2Substituting the formula of the imaging rule of the convex lens to obtain:
focal length of focus S1
Focus S1 with respect to O1Distance of points L3 ═ f3+ d, can be obtained
The energy of the light source is in Gaussian distribution, and if the proportion of the energy of the focus S1 to the total energy is eta 1, the proportion of the energy of the focus S2 to the total energy is eta 2, and the proportion of the energy of the focus S3 to the total energy is eta 3, the energy of the light source is in Gaussian distribution
The test results of the present invention are shown in the following table:
therefore, the invention can effectively improve the focal length, control the distance between the focuses, is beneficial to cutting crystals and can be widely applied to more fields.
The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.
Claims (2)
1. A multifocal system with long focal length, comprising a left convex lens (1) and a right convex lens (2) arranged in parallel, characterized in that the distance between the left convex lens (1) and the right convex lens (2) is d, the radius of the lens of the left convex lens (1) is R, the aperture at the center is R1, and the optical center is O1The radius of the lens of the right convex lens (2) is R3, and the optical center is O2；
Parallel light rays pass through a hole in the center of the left convex lens (1) and are focused by the right convex lens (2) to form a focus S3;
parallel light rays are focused by the left convex lens (1) and spread from two sides of the right convex lens (2) to form a focus S2;
a part of light rays of which the parallel light rays are focused by the left convex lens (1) are focused by the right convex lens (2) to form a focus S1 which is closest to the left convex lens
，R>R2>R3>R1Wherein f is4Is the optical center O of the left convex lens (1)1And the focal point S2.
2. According toA multifocal system of long focal length as claimed in claim 1, characterized in that the foci S1 to O1Distance of points L1, focus S2 to O1The distance between the points is L2, the focus S3 and the optical center O1The distance of the points is L3;
the focal length of the left convex lens (1) is f1The focal length of the right convex lens (2) is f2；
Focus S1 to O1The distance L2 between the points is equal to the focal length f of the left convex lens (1)1I.e. L2= f1At the same time, the focus S2 goes to the optical center O1Distance of points L2= f2+d；
The object distance between the focus S1 and the right convex lens (2) is L1= - (f)1-d) the formula of the imaging law of the convex lens is
Where f is the focal length of the lens, u is the object distance, v is the image distance, and for the focal point S1, u = - (f)1-d），f=f2Substituting the formula of the imaging rule of the convex lens to obtain:
focal length of focus S1
Then focus S1 is relative to O1Distance of points L3= f3+ d, can be obtained
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011350076.9A CN112305703A (en) | 2020-11-26 | 2020-11-26 | Long-focal-length multi-focal-point system |
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| CN202011350076.9A CN112305703A (en) | 2020-11-26 | 2020-11-26 | Long-focal-length multi-focal-point system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1575909A (en) * | 2003-07-11 | 2005-02-09 | 株式会社迪斯科 | Machining apparatus utilizing laser beam |
| US20070017993A1 (en) * | 2005-07-20 | 2007-01-25 | Ulrich Sander | Optical Device With Increased Depth Of Field |
| US20100118419A1 (en) * | 2008-11-10 | 2010-05-13 | Samsung Electronics Co., Ltd. | Method of constructing physical lens based on depth-of-focus characteristics, and lens with extended depth of focus constructed by the method |
| US20100214468A1 (en) * | 2009-02-20 | 2010-08-26 | Thales Canada Inc | Dual field-of-view optical imaging system with dual focus lens |
| CN101996651A (en) * | 2009-08-24 | 2011-03-30 | 汤姆森特许公司 | Objective lens and optical pickup comprising the objective lens |
| CN106695113A (en) * | 2016-12-08 | 2017-05-24 | 华中科技大学 | Axial bifocus lens |
-
2020
- 2020-11-26 CN CN202011350076.9A patent/CN112305703A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1575909A (en) * | 2003-07-11 | 2005-02-09 | 株式会社迪斯科 | Machining apparatus utilizing laser beam |
| US20070017993A1 (en) * | 2005-07-20 | 2007-01-25 | Ulrich Sander | Optical Device With Increased Depth Of Field |
| US20100118419A1 (en) * | 2008-11-10 | 2010-05-13 | Samsung Electronics Co., Ltd. | Method of constructing physical lens based on depth-of-focus characteristics, and lens with extended depth of focus constructed by the method |
| US20100214468A1 (en) * | 2009-02-20 | 2010-08-26 | Thales Canada Inc | Dual field-of-view optical imaging system with dual focus lens |
| CN101996651A (en) * | 2009-08-24 | 2011-03-30 | 汤姆森特许公司 | Objective lens and optical pickup comprising the objective lens |
| CN106695113A (en) * | 2016-12-08 | 2017-05-24 | 华中科技大学 | Axial bifocus lens |
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