CN100399099C - Optical lens used for point-source concourse image-forming - Google Patents

Abstract

This invention relates to one spot light source focus imaging optical lens head in optical technique and relates to one light source focus imaging optical lens improvement, which is characterized by the following: it comprises tighten screw nail, lens cylinder, non-sphere reflection lens, diaphragm, sphere reflection lens, sphere reflection lens tighten screw nail and adjust pad. This invention totally adopts reflection optical elements and uses non-sphere optical design technique to eliminate lens set bias to get micro spot size with high quality.

Description

A kind ofly be used for the optical lens that pointolite pools picture

Technical field

The invention belongs to optical technology, relate to being used for the improvement that pointolite pools the picture optical lens.

Background technology

Small luminous point has original application in the photoelectricity test field, as the detection of the detection of the responsive unit of CCD, infrared detector array unit, the test of CPT electron gun performance, heavenly body sensor celestial body location etc.The light that small luminous point is sent pointolite by specially designed optical lens system usually pools picture and obtains.At present, all adopt parallel light tube both at home and abroad, the light beam light of earlier pointolite being sent becomes directional light, and then directional light is converged obtains small luminous point with converging lens combination.(as Zhang Qing, " making the strict point-foussed convex lens of directional light ", Anhui University of Technology's journal, Vol.18, No.2,2001:170-172; Born and Wolf, " Principles of Optics:Electromagnetic Theory of Propagation, Interference andDiffraction of Light, Seventh (Expanded) Edition ", CambridgeUniversity Press, 1999) problem that exists of this mode is: the structure more complicated of whole optical lens system on the one hand, on the other hand, because the intrinsic aberration of lens is difficult to eliminate, often be difficult to obtain the high-quality small luminous point of Design Theory.

Summary of the invention

The objective of the invention is: at the present situation that is difficult to obtain at present the small luminous point of high-quality both at home and abroad, propose a kind of pointolite that is used for and pool picture, simple in structure, as can to eliminate aberration optical lens system, to obtain high-quality micron-sized small luminous point, satisfy the demand of microsize element and heavenly body sensor high Precision Detection.

Technical scheme of the present invention is: a kind ofly be used for the optical lens that pointolite pools picture, it is characterized in that, it by trip bolt 4, lens barrel 5, non-spherical reflector 6, diaphragm 7, spherical reflector 8, spherical reflector trip bolt 9, adjust pad 10 and form, lens barrel 5 is connected to whole annulus 5b by a disk 5a, with the circumferential edges of disk 5a and is positioned at the center of disk 5a and constitutes with central shaft 5c that disk 5a is connected to integral body; At the center of disk 5a by with disk 5a annular entrance pupil [1] concentric, that form by 3～6 sections circular arc through slots that are uniformly distributed along the circumference, the roundlet arc dia r of circular arc through slot is more than or equal to the diameter of central shaft 5c, the orthodrome diameter R=r+t of circular arc through slot, t is the radial width of circular arc through slot, t=5～10mm mm, the width p=1～3mm mm of the dowel between adjacent two sections circular arc through slot terminations; There is threaded hole at end face center at central shaft 5c; The threaded hole that 3～6 perforations that are uniformly distributed along the circumference are arranged on disk 5a has the threaded hole of 3～6 perforations that are uniformly distributed along the circumference on annulus 5b, trip bolt 4 is screwed in the above-mentioned threaded hole; The end face of annulus 5b is the step end face that has internal thread, and round belt has internal thread in the major diameter of this step end face; Non-spherical reflector 6 is an annular, the diameter of its center pit is greater than the orthodrome diameter R of entrance pupil [1], the inner cylinder face of the external cylindrical surface of non-spherical reflector 6 and annulus 5b is slidingly matched, and fastened screw 4 compresses, the left surface of non-spherical reflector 6 is the plane, abut on the right flank of disk 5a, the right flank of non-spherical reflector 6 is recessed aspheric reflecting surface; The axial length of non-spherical reflector 6 is less than the distance from the right flank of disk 5a to the step end face of annulus 5b; Spherical reflector 8 is annulus that have center pit, its diameter s=20～30mm, the left surface of spherical reflector 8 is a spherical reflective surface, its right flank is the plane, spherical reflector trip bolt 9 is screwed in the threaded hole of central shaft 5c end face after passing the center pit of spherical reflector 8, spherical reflector 8 is fixed on the end face of central shaft 5c, adjusts pad 10 between the left surface of the end face of central shaft 5c and spherical reflector 8; Diaphragm 7 is cylinders, its left side is for having externally threaded step end face, the engagement of the internal thread of its external thread and annulus 5b end face, the right flank of diaphragm 7 be one have the central stop hole, be connected to whole aperture plate, the diameter D=40～60mm of its aperture with cylinder; The light that sends from the light source 3 that is positioned on the optical axis of entrance pupil [1] left side, incide on the reflecting surface of spherical reflector 8 through entrance pupil [1], after the reflection of spherical reflector 8, incide the reflecting surface of non-spherical reflector 6, after the reflection of non-spherical reflector 6, pass diaphragm 7 and converge to convergent point 11 on the diaphragm 7 right side optical axises.

Advantage of the present invention is: the present invention has all adopted the mirror optics element, and has utilized the aspherics designing technique, has eliminated the Aberration Problem that adopts lens combination to exist, and the small spot definition of acquisition is little, the quality height.Simultaneously, simple in structure, cost is low, helps assembling processing and guarantees precision.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Embodiment

Below the present invention is described in further details.Referring to Fig. 1, optical lens of the present invention is characterized in that, it is made up of trip bolt 4, lens barrel 5, non-spherical reflector 6, diaphragm 7, spherical reflector 8, spherical reflector trip bolt 9, adjustment pad 10.

Lens barrel 5 is carriers of whole camera lens, and it is connected to whole annulus 5b by a disk 5a, with the circumferential edges of disk 5a and is positioned at the center of disk 5a and is connected to whole central shaft 5c with disk 5a and constitutes.At the center of disk 5a by with disk 5a annular entrance pupil [1] concentric, that form by 3～6 sections circular arc through slots that are uniformly distributed along the circumference, the roundlet arc dia r of circular arc through slot is more than or equal to the diameter of central shaft 5c, the orthodrome diameter R=r+t of circular arc through slot, t is the radial width of circular arc through slot, t=5～10mm.Width p=1～the 3mm of the dowel between adjacent two sections circular arc through slot terminations.The effect of these dowels is that annulus 5b and central shaft 5c are connected to integral body.There is threaded hole at end face center at central shaft 5c.The threaded hole that 3～6 perforations that are uniformly distributed along the circumference are arranged on disk 5a has the threaded hole of 3～6 perforations that are uniformly distributed along the circumference on annulus 5b, trip bolt 4 is screwed in the above-mentioned threaded hole.The effect that is positioned at the trip bolt 4 on the disk 5a is that the position of non-spherical reflector 6 is finely tuned.The end face of annulus 5b is the step end face that has internal thread, and round belt has internal thread in the major diameter of this step end face.

Non-spherical reflector 6 is an annular, the diameter of its center pit is greater than the orthodrome diameter R of entrance pupil [1], the inner cylinder face of the external cylindrical surface of non-spherical reflector 6 and annulus 5b is slidingly matched, and fastened screw 4 compresses, the left surface of non-spherical reflector 6 is the plane, abut on the right flank of disk 5a, the right flank of non-spherical reflector 6 is recessed aspheric reflecting surface.The axial length of non-spherical reflector 6 is less than the distance from the right flank of disk 5a to the step end face of annulus 5b.

Spherical reflector 8 is annulus that have center pit, its diameter s=20～30mm, the left surface of spherical reflector 8 is a spherical reflective surface, its right flank is the plane, spherical reflector trip bolt 9 is screwed in the threaded hole of central shaft 5c end face after passing the center pit of spherical reflector 8, spherical reflector 8 is fixed on the end face of central shaft 5c, adjusts pad 10 between the left surface of the end face of central shaft 5c and spherical reflector 8.

Diaphragm 7 is cylinders, its left side is for having externally threaded step end face, the engagement of the internal thread of its external thread and annulus 5b end face, the right flank of diaphragm 7 be one have the central stop hole, be connected to whole aperture plate, the diameter D=40～60mm of its aperture with cylinder.

The light that sends from the light source 3 that is positioned on the optical axis of entrance pupil [1] left side, incide on the reflecting surface of spherical reflector 8 through entrance pupil [1], after the reflection of spherical reflector 8, incide the reflecting surface of non-spherical reflector 6, after the reflection of non-spherical reflector 6, pass diaphragm 7 and converge to convergent point 11 on the diaphragm 7 right side optical axises.

The aspheric reflecting surface of said non-spherical reflector 6 is a high order aspheric surface, can adopt following equation:

$z=\frac{c{x}^2}{1+\sqrt{1-(1+k)c^2{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="C20071009868300081.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}}+a_1{x}^2+a_2{x}^4+a_3{x}^6,$ In the formula:

$c=\frac{1}{60.47732},$ Constant;

K=0.01641094, constant;

a ₁=4.966437 * 10 ^-5, the quadratic term coefficient;

a ₂=1.4413332 * 10 ^-9, four item coefficients;

a ₃=8.5087897 * 10 ^-14, six item coefficients;

The radius of a ball of the spherical reflective surface of said spherical reflector 8 is 20～30mm.

Said non-spherical reflector 6 and spherical reflector 8 can be glass reflector, are coated with reflectance coating on its reflecting surface; Perhaps, said non-spherical reflector 6 and spherical reflector 8 are the aluminum catoptron, and its reflecting surface is a polished surface.

Embodiment.

In one embodiment of the present of invention, every design parameter of camera lens is:

Object distance: 600mm

Image distance: 19.35mm

Picture side's focal length: 20.23mm

The orthodrome diameter of entrance pupil: 24.90mm

The little arc diameter of entrance pupil: 10.90mm

The radial width of entrance pupil circular arc through slot: 7.00mm

The width of dowel: 1.50mm

The diameter of spherical reflector annulus: 26.20mm

The radius of a ball of spherical reflector: 25.32mm

The number of entrance pupil circular arc through slot: 3

The M5 threaded hole of 6 perforations is uniformly distributed along the circumference on disk 5a

The M5 threaded hole of 6 perforations is uniformly distributed along the circumference on annulus 5b

Point disc of confusion diameter on the axle: less than 10.00 μ m

Diameter 0.40mm pointolite pools the picture size: 7.81 μ m

Claims (3)

1. one kind is used for the optical lens that pointolite pools picture, it is characterized in that, it by trip bolt [4], lens barrel [5], non-spherical reflector [6], diaphragm [7], spherical reflector [8], spherical reflector trip bolt [9], adjust pad [10] and form, lens barrel [5] is connected to whole annulus [5b] by a disk [5a], with the circumferential edges of disk [5a] and is positioned at the center of disk [5a] and is connected to central shaft [5c] formation of integral body with disk [5a]; Have at the center of disk [5a] and disk [5a] annular entrance pupil [1] concentric, that form by 3～6 sections circular arc through slots that are uniformly distributed along the circumference, the roundlet arc dia r of circular arc through slot is more than or equal to the diameter of central shaft [5c], the orthodrome diameter R=r+t of circular arc through slot, t is the radial width of circular arc through slot, t=5～10mm, the width p=1～3mm of the dowel between adjacent two sections circular arc through slot terminations; There is threaded hole at end face center at central shaft [5c]; The threaded hole that 3～6 perforations that are uniformly distributed along the circumference are arranged on disk [5a] has the threaded hole of 3～6 perforations that are uniformly distributed along the circumference on annulus [5b], trip bolt [4] is screwed in the above-mentioned threaded hole; The end face of annulus [5b] is the step end face that has internal thread, and round belt has internal thread in the major diameter of this step end face; Non-spherical reflector [6] is an annular, the diameter of its center pit is greater than the orthodrome diameter R of entrance pupil [1], the inner cylinder face of the external cylindrical surface of non-spherical reflector [6] and annulus [5b] is slidingly matched, and fastened screw [4] compresses, the left surface of non-spherical reflector [6] is the plane, abut on the right flank of disk [5a], the right flank of non-spherical reflector [6] is recessed aspheric reflecting surface; The axial length of non-spherical reflector [6] is high to the distance of the step end face of annulus [5b] less than the right flank from disk [5a]; Spherical reflector [8] is an annulus that has center pit, its diameter s=20～30mm, the left surface of spherical reflector [8] is a spherical reflective surface, its right flank is the plane, spherical reflector trip bolt [9] is screwed in the threaded hole of central shaft [5c] end face after passing the center pit of spherical reflector [8], spherical reflector [8] is fixed on the end face of central shaft [5c], adjusts between the left surface that pad [10] is positioned at the end face of central shaft [5c] and spherical reflector [8]; Diaphragm [7] is a cylinder, its left side is for having externally threaded step end face, the engagement of the internal thread of its external thread and annulus [5b] end face, the right flank of diaphragm [7] be one have the central stop hole, be connected to whole aperture plate, the diameter D=40～60mm of its aperture with cylinder; The light that sends from the light source [3] that is positioned on the optical axis of entrance pupil [1] left side, incide on the reflecting surface of spherical reflector [8] through entrance pupil [1], after the reflection of spherical reflector [8], incide the reflecting surface of non-spherical reflector [6], after the reflection of non-spherical reflector [6], pass diaphragm [7] and converge to convergent point [2] on the optical axis of diaphragm [7] right side.

2. optical lens according to claim 1 is characterized in that, the aspheric reflecting surface of said non-spherical reflector [6] is a high order aspheric surface, and its equation is:

$z=\frac{c{x}^2}{1+\sqrt{1-(1+k)c^2{r}^2}}+a_1{x}^2+a_2{x}^4+a_3{x}^6,$ In the formula:

$c=\frac{1}{60.47732},$ Constant;

K=0.01641094, constant;

a ₁=4.966437 * 10 ^-5, the quadratic term coefficient;

a ₂=1.4413332 * 10 ^-9, four item coefficients;

a ₃=8.5087897 * 10 ^-14, six item coefficients;

The radius of a ball of the spherical reflective surface of said spherical reflector [8] is 20～30mm.

3. optical lens according to claim 1 and 2 is characterized in that, said non-spherical reflector [6] and spherical reflector [8] are glass reflector, are coated with reflectance coating on its reflecting surface; Perhaps, said non-spherical reflector [6] and spherical reflector [8] are the aluminum catoptron, and its reflecting surface is a polished surface.

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