CN104345429A - Optical system of camera adapter for endoscope - Google Patents
Optical system of camera adapter for endoscope Download PDFInfo
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- CN104345429A CN104345429A CN201410184450.0A CN201410184450A CN104345429A CN 104345429 A CN104345429 A CN 104345429A CN 201410184450 A CN201410184450 A CN 201410184450A CN 104345429 A CN104345429 A CN 104345429A
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- G—PHYSICS
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- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2476—Non-optical details, e.g. housings, mountings, supports
- G02B23/2484—Arrangements in relation to a camera or imaging device
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Abstract
The invention relates to an optical system of a camera adapter for an endoscope. The optical system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the principal optic axes of the six lenses are positioned on the same straight line; the first lens and the sixth lens are window plates and are respectively arranged at the two ends of the optical system; the second lens and the fifth lens are meniscus lenses and are arranged between the first lens and the sixth lens, and the concave surfaces of the second lens and the fifth lens are respectively arranged towards the first lens and the sixth lens; the third lens and the fourth lens are double-gluing lenses and are arranged between the second lens and the fifth lens; each double-gluing lens is formed by gluing a biconvex lens and a biconcave lens; the biconvex lenses of the third lens and the fourth lens are respectively arranged towards the second lens and the fifth lens; the biconcave lenses of the third lens and the fourth lens are arranged in an opposite way. After the optical system is adopted, the resolution ratio of the camera adapter for the endoscope is remarkably improved; the optical system is suitable for a high-definition camera with the pixel of more than two million.
Description
Technical field
The present invention relates to endoscope-use shooting adapter, particularly relate to a kind of endoscope-use shooting adapter optical system coordinating the high-definition camera of pixel more than 2,000,000 (CCD/CMOS) to use.
Background technology
At present, endoscope has been widely used in medical operating, and surgical staff, by elongated endoscope, can be observed the details of body cavity inner disease foci, thus complete operation.
Rigid endoscope is generally primarily of three part compositions: one is the slender type endoscope that objective lens optical system is equipped with in inside, and it inserts detection pathology in human body; Two is shooting adapters, and connect endoscope and rear-end camera, the image transfer detected by endoscope is to rear-end camera; Three is cameras, obtains image being shot, changes light signal into electric signal, be sent to display, is convenient to observation.
In recent years, along with the remarkable lifting of shooting resolution, rigid endoscope has brought into use the high-definition camera of a more than mega pixel, therefore, require that endoscope-use shooting adapter optical system is on the basis ensureing visual field and the depth of field, also to have high-resolution imaging quality, to realize the high-fidelity transfer of picture signal between endoscope and camera.Meanwhile, also require that endoscope-use shooting adapter structure is compact, be applicable to hand-held, easy to operate.
Propose in Chinese patent 02216947.4 and peep camera system optical lens assembly a kind of comprising in five eyeglasses, this optical lens assembly overcomes that conventional three lens type camera lenses are heavy, distort the defect such as serious, its resolution is 100lp/mm, is applicable to the CCD camera of 800,000 pixels.But peep the demand that camera system optical lens assembly can not meet the high-definition camera of a more than mega pixel in this, can image fault be caused in shooting process.
In Chinese patent 200420020588.9, propose a kind of Zooming CCD adapter, this adapter can be focused, and changes image magnification ratio, but does not set forth its resolution that can reach and image quality in the patent.This adapter comprises nine eyeglasses (wherein two panels is window), is divided into focusing arrangement of mirrors head and fixing arrangement of mirrors head, realizes lens group move forward and backward by the straight type slotted eye on lens barrel and helical groove hole and guide pole.Double-deck barrel due to this adapter lens barrel is all provided with slotted eye, is easy to occur the problems such as loosening and poorly sealed due to wearing and tearing in Long-Time Service process, thus affects the normal surgical instrument disinfection program of endoscope compatible device.In addition, this adapter structure size increases, and adds the cost of instrument production and processing.
Summary of the invention
The object of the invention is to, overcome the defect that prior art exists, and a kind of endoscope-use shooting adapter optical system of new structure is provided, technical matters to be solved is the resolution that can significantly improve endoscope-use shooting adapter, thus is applicable to the endoscope high-definition camera of pixel more than 2,000,000.
Another object of the present invention is to, overcome the defect that prior art exists, and a kind of endoscope-use shooting adapter optical system of new structure is provided, technical matters to be solved makes its wear-resistant and resist chemical characteristic that can promote endoscope-use shooting adapter, and compact conformation, cost are low.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of endoscope-use shooting adapter optical system that the present invention proposes, it comprises: the second eyeglass that primary optical axis is located along the same line, the 3rd eyeglass, the 4th eyeglass and the 5th eyeglass; Wherein, described second eyeglass and described 5th eyeglass are meniscus lens, be arranged at the two ends of described optical system respectively, and its concave surface are respectively towards the outside of described optical system; Described 3rd eyeglass and described 4th eyeglass are two cemented doublet, are arranged between described second eyeglass and described 5th eyeglass; Described pair of cemented doublet is glued together by biconvex lens and biconcave lens to form, and the described biconvex lens of the described biconvex lens of described 3rd eyeglass and described 4th eyeglass is respectively towards described second eyeglass and described 5th eyeglass, and the described biconcave lens of described 3rd eyeglass is relative with the described biconcave lens of described 4th eyeglass.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid endoscope-use shooting adapter optical system, also comprise: the first eyeglass and the 6th eyeglass, described first eyeglass and described 6th eyeglass are window, be arranged at the outside of described second eyeglass and described 5th eyeglass respectively, and the concave surface of described second eyeglass and described 5th eyeglass is respectively towards described first eyeglass and described 6th eyeglass.
Aforesaid endoscope-use shooting adapter optical system, the total length of wherein said optical system is 53.5mm, and focal length is 30mm, and field angle is 12.4 °, and resolution is 180lp/mm.
Aforesaid endoscope-use shooting adapter optical system, the important technological parameters of wherein said optical system is as follows:
| Parameter | Data (unit: mm) | Parameter | Data (unit: mm) |
| R1 | ∞ | T1 | 1 |
| R2 | ∞ | T2 | 2 |
| R3 | 12-13 | T3a | 3.5 |
| R4 | 16-17 | T3b | 2 |
| R5 | 13-14 | T4a | 2 |
| R6 | 27-28 | T4b | 4 |
| R7 | 10-11 | T5 | 2.5 |
| R8 | 49-50 | T6 | 1 |
| R9 | 15-16 | D1 | 14-14.5 |
| R10 | 18-19 | D2 | 0.5-1 |
| R11 | 14-15 | D3 | 6.5-7 |
| R12 | 44-45 | D4 | 0.5-1 |
| R13 | ∞ | D5 | 14-14.5 |
| R14 | ∞ |
Wherein, R is radius-of-curvature, R1 and R2 is respectively the radius-of-curvature on described first eyeglass two sides, R3 and R4 is respectively the radius-of-curvature on described second eyeglass two sides, R5, R6 and R7 is respectively the radius-of-curvature of the non-cemented surface of the described biconvex lens of described 3rd eyeglass, the radius-of-curvature of the non-cemented surface of the radius-of-curvature of the described described biconvex lens of the 3rd eyeglass and the cemented surface of described biconcave lens and the described biconcave lens of described 3rd eyeglass, R8, R9 and R10 is respectively the radius-of-curvature of the non-cemented surface of the described biconcave lens of described 4th eyeglass, the radius-of-curvature of the non-cemented surface of the radius-of-curvature of the described described biconcave lens of the 4th eyeglass and the cemented surface of described biconvex lens and the described biconvex lens of described 4th eyeglass, R11 and R12 is respectively the radius-of-curvature on described 5th eyeglass two sides, R13 and R14 is respectively the radius-of-curvature on described 6th eyeglass two sides, T is lens thickness, T1 is the thickness of described first eyeglass, T2 is the thickness of described second eyeglass, T3a is the thickness of the described biconvex lens of described 3rd eyeglass, T3b is the thickness of the described biconcave lens of described 3rd eyeglass, and T4a is the thickness of the described biconcave lens of described 4th eyeglass, and T4b is the thickness of the described biconvex lens of described 4th eyeglass, T5 is the thickness of described 5th eyeglass, and T6 is the thickness of described 6th eyeglass, D is the spacing distance between eyeglass, D1 is the spacing distance between described first eyeglass and described second eyeglass, D2 is the spacing distance between described second eyeglass and described 3rd eyeglass, D3 is the spacing distance between described 3rd eyeglass and described 4th eyeglass, D4 is the spacing distance between described 4th eyeglass and described 5th eyeglass, and D5 is the spacing distance between described 5th eyeglass and described 6th eyeglass.
Aforesaid endoscope-use shooting adapter optical system, wherein said first eyeglass and described 6th eyeglass are optics sapphire window.
Aforesaid endoscope-use shooting adapter optical system, wherein said biconcave lens is refractive index 1.6, the flint glass lens of dispersive power 35.
Aforesaid endoscope-use shooting adapter optical system, the described meniscus lens of wherein said second eyeglass and the described biconvex lens of described 3rd eyeglass are refractive index 1.75, the crown glass lens containing group of the lanthanides of dispersive power 45.
Aforesaid endoscope-use shooting adapter optical system, the refractive index of the described biconvex lens of wherein said second eyeglass, described 3rd eyeglass, the described biconvex lens of described 4th eyeglass and described 5th eyeglass and dispersive power than the refractive index of the described biconcave lens of described 3rd eyeglass and described 4th eyeglass and dispersive power high.
Aforesaid endoscope-use shooting adapter optical system, refractive index and the dispersive power of wherein said second eyeglass and described 5th eyeglass are identical, and the described biconvex lens of described 3rd eyeglass is identical with the refractive index of the described biconvex lens of described 4th eyeglass and dispersive power; Or the refractive index of the second eyeglass is high described in the refractive index ratio of described 5th eyeglass, described in the refractive index ratio of the described biconvex lens of described 4th eyeglass, the refractive index of the described biconvex lens of the 3rd eyeglass is high.
Aforesaid endoscope-use shooting adapter optical system, by the first spacer ring interval between wherein said second eyeglass and described 3rd eyeglass, be arranged in the first sleeve, by the second spacer ring interval between described 4th eyeglass and described 5th eyeglass, be arranged in the second sleeve; Described first sleeve is arranged in described second sleeve, and its one end is near described 4th eyeglass, and the other end is compressed by trim ring.
The present invention compared with prior art has obvious advantage and beneficial effect.By technique scheme, a kind of endoscope-use shooting of the present invention adapter optical system at least has following advantages and beneficial effect:
One, endoscope-use shooting adapter optical system of the present invention adopts double gauss structure optimization to form, and the resolution of system is high, can improve the quality of optical imaging of endoscope-use shooting adapter, be applicable to the high-definition camera of pixel more than 2,000,000.
Two, endoscope-use shooting adapter optical system of the present invention is wear-resistant, anticorrosive, can strengthen resistance to reagent corrosivity and the mar proof of endoscope-use shooting adapter.
Three, endoscope-use shooting adapter optical system structure of the present invention is compact, and size is little, lightweight, is applicable to hand-held, can reduces the cost of production and processing.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of instructions, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the cross-sectional schematic of endoscope-use of the present invention shooting adapter.
Fig. 2 is the schematic diagram of endoscope-use of the present invention shooting adapter optical system.
Fig. 3 is the schematic diagram of endoscope-use of the present invention shooting adapter optical system different visual fields disc of confusion.
Fig. 4 is the curve map of endoscope-use of the present invention shooting adapter modulation transfer function of optical system.
Fig. 5 A and Fig. 5 B is the index path of endoscope-use of the present invention shooting adapter optical system imaging.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to a kind of its embodiment of endoscope-use shooting adapter optical system, structure, feature and effect thereof of proposing according to the present invention, be described in detail as follows.
Referring to shown in Fig. 1, is the cross-sectional schematic of endoscope-use of the present invention shooting adapter.The second eyeglass 2, the 3rd eyeglass 3, the 4th eyeglass 4 and the 5th eyeglass 5 that endoscope-use shooting adapter optical system of the present invention is located along the same line primarily of primary optical axis form.Wherein, the second eyeglass 2 and the 5th eyeglass 5 are meniscus lens, be arranged at the two ends of optical system respectively, and its concave surface are respectively towards the outside of optical system.3rd eyeglass 3 and the 4th eyeglass 4 are two cemented doublet, are arranged between the second eyeglass 2 and the 5th eyeglass 5.This pair of cemented doublet is glued together with biconcave lens 3b, 4a respectively by biconvex lens 3a, 4b to form, and wherein the 3rd eyeglass 3 is glued together by biconvex lens 3a and biconcave lens 3b to form, and the 4th eyeglass 4 is glued together by biconcave lens 4a and biconvex lens 4b to form.And the biconvex lens 4b of the biconvex lens 3a of the 3rd eyeglass 3 and the 4th eyeglass 4 is respectively towards the second eyeglass 2 and the 5th eyeglass 5, and the biconcave lens 3b of the 3rd eyeglass 3 is relative with the biconcave lens 4a of the 4th eyeglass 4.
As shown in Figure 1, shooting adapter optical system of the present invention is also respectively equipped with the first eyeglass 1 and the 6th eyeglass 6 in the outside of the second eyeglass 2 and the 5th eyeglass 5.First eyeglass 1 and the 6th eyeglass 6 are window, and the concave surface of the second eyeglass 2 and the 5th eyeglass 5 is respectively towards the first eyeglass 1 and the 6th eyeglass 6.
Referring to shown in Fig. 2, is the schematic diagram of endoscope-use of the present invention shooting adapter optical system.The total length of endoscope-use shooting adapter optical system of the present invention can be 53.5mm, and focal length can be 30mm, and field angle can be 12.4 °, and resolution can reach 180lp/mm.Its important technological parameters can consult table 1 below:
Table 1
| Parameter | Data (unit: mm) | Parameter | Data (unit: mm) |
| R1 | ∞ | T1 | 1 |
| R2 | ∞ | T2 | 2 |
| R3 | 12-13 | T3a | 3.5 |
| R4 | 16-17 | T3b | 2 |
| R5 | 13-14 | T4a | 2 |
| R6 | 27-28 | T4b | 4 |
| R7 | 10-11 | T5 | 2.5 |
| R8 | 49-50 | T6 | 1 |
| R9 | 15-16 | D1 | 14-14.5 |
| R10 | 18-19 | D2 | 0.5-1 |
| R11 | 14-15 | D3 | 6.5-7 |
| R12 | 44-45 | D4 | 0.5-1 |
| R13 | ∞ | D5 | 14-14.5 |
| R14 | ∞ |
Wherein, R is radius-of-curvature, R1 and R2 is respectively the radius-of-curvature on the first eyeglass 1 two sides, R3 and R4 is respectively the radius-of-curvature on the second eyeglass 2 two sides, R5, R6 and R7 is respectively the radius-of-curvature of the non-cemented surface of the biconvex lens 3a of the 3rd eyeglass 3, the radius-of-curvature of the non-cemented surface of the radius-of-curvature of the biconvex lens 3a of the 3rd eyeglass 3 and the cemented surface of biconcave lens 3b and the biconcave lens 3b of the 3rd eyeglass 3, R8, R9 and R10 is respectively the radius-of-curvature of the non-cemented surface of the biconcave lens 4a of the 4th eyeglass 4, the radius-of-curvature of the non-cemented surface of the radius-of-curvature of the biconcave lens 4a of the 4th eyeglass 4 and the cemented surface of biconvex lens 4b and the biconvex lens 4b of the 4th eyeglass 4, R11 and R12 is respectively the radius-of-curvature on the 5th eyeglass 5 two sides, R13 and R14 is respectively the radius-of-curvature on the 6th eyeglass 6 two sides, T is lens thickness, T1 is the thickness of the first eyeglass 1, T2 is the thickness of the second eyeglass 2, T3a is the thickness of the biconvex lens 3a of the 3rd eyeglass 3, T3b is the thickness of the biconcave lens 3b of the 3rd eyeglass 3, and T4a is the thickness of the biconcave lens 4a of the 4th eyeglass 4, and T4b is the thickness of the biconvex lens 4b of the 4th eyeglass 4, T5 is the thickness of the 5th eyeglass 5, and T6 is the thickness of the 6th eyeglass 6, D is the spacing distance between eyeglass, D1 is the spacing distance between the first eyeglass 1 and the second eyeglass 2, D2 is the spacing distance between the second eyeglass 2 and the 3rd eyeglass 3, D3 is the spacing distance between the 3rd eyeglass 3 and the 4th eyeglass 4, D4 is the spacing distance between the 4th eyeglass 4 and the 5th eyeglass 5, and D5 is the spacing distance between the 5th eyeglass 5 and the 6th eyeglass 6.
First eyeglass 1 of endoscope-use shooting adapter optical system of the present invention can be consistent with all parameters of the 6th eyeglass 6, as the protection window of optical system.Endoscope-use shooting adapter optical system of the present invention is connected on endoscope; as the accessory of medicine equipment, need through chemical reagent sterilization supervisor before use, therefore; protection window except there is sealing and translucent effect, also to have corrosion-resistant with the feature such as to resistance to wear.Therefore, the first eyeglass 1 of the present invention and the 6th eyeglass 6 can be selected to be had very high surface hardness and has the optics sapphire material of high-resistance as diaphragm to chemical acid alkali, to strengthen resistance to reagent corrosivity and the mar proof of endoscope-use shooting adapter.
Endoscope-use shooting adapter optical system of the present invention adopts double gauss structure optimization to form, and this structure is symmetrical structure, has the ability of the vertical axial aberrations such as corrective system coma, distortion and chromatic longitudiinal aberration.Two panels eyeglass outside this system, the form that namely the second eyeglass 2 is outside from the two panels monolithic convex lens surface outside traditional double gauss structure with the 5th eyeglass 5 is different, is concave surface outside.Wherein, the concave surface of the second eyeglass 2 is outside, can increase the visual field of system, make more light inject system; And the concave surface of the 5th eyeglass 5 is outside, can the focusing power of effective control system, by endoscope become image accurately to focus on the focal plane of rear end CCD camera.
Because off-axis ray there are differences at the focusing power between the meridian ellipse and sagittal surface of different elements, and positive and negative optical element (convex lens and concavees lens) produces contrary impact to this species diversity.According to this characteristic, optical system of the present invention is by choosing the different two cemented doublet of positive and negative optical element (convex lens and concavees lens) composition, wherein the 3rd eyeglass 3 and the 4th eyeglass 4 are two cemented doublet, and are symmetrical structure, for the curvature of field and the effect of astigmatism of bucking-out system.In addition, the two cemented doublet of employing also helps the aberration that elimination system causes due to wavelength.
Shown in Fig. 1 and Fig. 2, the second eyeglass 2 of optical system of the present invention, the 3rd eyeglass 3, the 4th eyeglass 4 and the 5th eyeglass 5 be overall concave to centre, contribute to the incident ray balancing each lens field like this, reduce higher order aberratons.
The selection of the material of the eyeglass of optical system of the present invention mainly should consider the spherical aberration of system and the correction of aberration, the focusing power of system and the several aspect of the cost of material.Wherein, airspace between each eyeglass of system, can assume with air is the negative eyeglass (air lens) of material, now using the center section of the biconcave lens 4a of the biconcave lens 3b of the 3rd eyeglass 3, negative eyeglass (air lens) and the 4th eyeglass 4 as system, using the first half of the biconvex lens 3a of the second eyeglass 2 and the 3rd eyeglass 3 as system, and using the biconvex lens 4b of the 4th eyeglass 4 and the 5th eyeglass 5 latter half as system.In order to spherical aberration and the aberration of corrective system, optical system of the present invention is according to dispersion characteristics, the eyeglass of center section can be made to adopt the material of low-refraction and low dispersive power, make the eyeglass of first half and latter half adopt the material of high index of refraction and high dispersive power, though the refractive index of first half and the eyeglass of latter half and dispersive power than the refractive index of the eyeglass of center section and dispersive power high.Therefore, the material of optical system first half eyeglass of the present invention can selective refraction rate 1.75, the crown glass containing group of the lanthanides of dispersive power about 45, and the material of center section eyeglass can selective refraction rate 1.6, the flint glass of dispersive power about 35.In order to increase the focusing of system, the material of optical system latter half eyeglass of the present invention can be mutually corresponding with the material of first half eyeglass, or selective refraction rate is a little more than the material of first half lens materials, namely biconvex lens 4b can identical with the material of biconvex lens 3a, the 5th eyeglass 5 can be identical with the material of the second eyeglass 2, or the refractive index of the material of biconvex lens 4b and the 5th eyeglass 5 is a little more than the material of biconvex lens 3a and the second eyeglass 2.
Optical system of the present invention under different visual field become the shape of hot spot as shown in Figure 3, Fig. 3 is the schematic diagram of endoscope-use of the present invention shooting adapter optical system different visual fields disc of confusion, its spot radius is respectively close to Airy disk radius r 0 under each visual field for optical system of the present invention, and its formula is:
Wherein, r
0for Airy disk radius, D is aperture diaphragm diameter, and R is the distance that diaphragm arrives image planes.
The curve of the modulation transfer function of optical system of the present invention as shown in Figure 4, Fig. 4 is the curve map of endoscope-use of the present invention shooting adapter modulation transfer function of optical system, as can be seen from the figure, in different visual fields modulated transport function close to diffraction limit, system can differentiate more than every millimeter of 180 pairs of lines, i.e. systemic resolution δ=180lp/mm.The maximum line width size Δ that system can be differentiated is 2.7um, and its formula is:
According to high-definition cameras more than 2,000,000 pixels, its receiving plane field size is 5.3mm × 3mm, and valid pixel is 1920 × 1080, and Pixel Dimensions is 2.75um × 2.75um.Therefore, the resolution maximum line width size Δ of optical system of the present invention and the sensor pixel size of high-definition camera match, endoscope-use shooting adapter optical system of the present invention can realize the complete transmission of image, and can not cause the loss of high-definition camera image-receptive.
Endoscope-use shooting adapter optical system of the present invention is by image objects that endoscope is taken the photograph on high-definition camera, and as shown in Fig. 5 A and Fig. 5 B, Fig. 5 A and Fig. 5 B is the index path of endoscope-use of the present invention shooting adapter optical system imaging.Wherein, in figure 12 is taken the photograph subject image by endoscope, 13 is the first eyeglass 1 of endoscope-use shooting adapter optical system, 14 is the second eyeglass 2 and the 3rd eyeglass 3 of endoscope-use shooting adapter optical system, 15 is the 4th eyeglass 4 and the 5th eyeglass 5 of endoscope-use shooting adapter optical system, 16 for the 6th eyeglass 6,17 of endoscope-use shooting adapter optical system be high-definition camera.Fig. 5 A is that coaxial situation debug by each eyeglass, and Fig. 5 B is that out-of-alignment situation debug by each eyeglass.
As can be seen from Fig. 5 A and Fig. 5 B, when disalignment debug by each eyeglass of endoscope-use shooting adapter optical system, very large centre deviation can be brought to optical system, thus affect image quality.Because the radius-of-curvature of the second eyeglass 2 and the 3rd eyeglass 3 is less, larger on the centre deviation impact of system.In order to reduce to debug the centre deviation brought, the method assembling optical system that endoscope-use shooting adapter optical system of the present invention adopts two sleeve to debug respectively.Shown in Fig. 1, the present invention be by between comparatively responsive the second eyeglass 2 of centre deviation and the 3rd eyeglass 3 by the first spacer ring 8 interval, be arranged in the first sleeve 9, the mechanical precision utilizing the first sleeve 9 and the align measurement debug in process, ensure the coaxial of the second eyeglass 2 and the 3rd eyeglass 3.Meanwhile, pass through the second spacer ring 7 interval, be arranged in the second sleeve 10 by between the 4th eyeglass 4 and the 5th eyeglass 5, equally, the mechanical precision utilizing the second sleeve 10 and the align measurement debug in process, guarantee the 4th eyeglass 4 is coaxial with the 5th eyeglass 5.After the first sleeve 9 and the second sleeve 10 are debug respectively, be arranged in the second sleeve 10 by the first sleeve 9, and make one end of the first sleeve 9 near the 4th eyeglass 4, the other end is compressed by trim ring 11.When carrying out above-mentioned installation, should be noted that the drying guaranteeing all parts, clean and not damaged, and will confirm that positive stop installed by each part, avoid occurring loosening and space.
Endoscope-use shooting adapter optical system of the present invention is by adopting double gauss structure, and it is optimized, reduce the vertical axial aberrations such as the coma of optical system, distortion and chromatic longitudiinal aberration, by integrally-built design, the adjustment of each eyeglass face shape parameter and the selection of material, correct the spherical aberration of optical system, aberration and system aggregate capabilities.Two sleeve Method of Adjustments that endoscope-use shooting adapter optical system of the present invention adopts, improve the alignment of shooting adapter optical system, the precision that the system of ensure that is debug.Therefore can realize high resolving power and the high definition image quality of endoscope-use shooting adapter optical system according to the present invention, and corrosion-resistant and mar proof can be improved, reduce production cost.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. an endoscope-use shooting adapter optical system, is characterized in that it comprises: the second eyeglass that primary optical axis is located along the same line, the 3rd eyeglass, the 4th eyeglass and the 5th eyeglass; Wherein, described second eyeglass and described 5th eyeglass are meniscus lens, be arranged at the two ends of described optical system respectively, and its concave surface are respectively towards the outside of described optical system; Described 3rd eyeglass and described 4th eyeglass are two cemented doublet, are arranged between described second eyeglass and described 5th eyeglass; Described pair of cemented doublet is glued together by biconvex lens and biconcave lens to form, and the described biconvex lens of the described biconvex lens of described 3rd eyeglass and described 4th eyeglass is respectively towards described second eyeglass and described 5th eyeglass, and the described biconcave lens of described 3rd eyeglass is relative with the described biconcave lens of described 4th eyeglass.
2. endoscope-use shooting adapter optical system according to claim 1, it is characterized in that it also comprises: the first eyeglass and the 6th eyeglass, described first eyeglass and described 6th eyeglass are window, be arranged at the outside of described second eyeglass and described 5th eyeglass respectively, and the concave surface of described second eyeglass and described 5th eyeglass is respectively towards described first eyeglass and described 6th eyeglass.
3. endoscope-use shooting adapter optical system according to claim 2, it is characterized in that the total length of wherein said optical system is 53.5mm, focal length is 30mm, and field angle is 12.4 °, and resolution is 180lp/mm.
4. endoscope-use shooting adapter optical system according to claim 3, is characterized in that the important technological parameters of wherein said optical system is as follows:
Wherein, R is radius-of-curvature, R1 and R2 is respectively the radius-of-curvature on described first eyeglass two sides, R3 and R4 is respectively the radius-of-curvature on described second eyeglass two sides, R5, R6 and R7 is respectively the radius-of-curvature of the non-cemented surface of the described biconvex lens of described 3rd eyeglass, the radius-of-curvature of the non-cemented surface of the radius-of-curvature of the described described biconvex lens of the 3rd eyeglass and the cemented surface of described biconcave lens and the described biconcave lens of described 3rd eyeglass, R8, R9 and R10 is respectively the radius-of-curvature of the non-cemented surface of the described biconcave lens of described 4th eyeglass, the radius-of-curvature of the non-cemented surface of the radius-of-curvature of the described described biconcave lens of the 4th eyeglass and the cemented surface of described biconvex lens and the described biconvex lens of described 4th eyeglass, R11 and R12 is respectively the radius-of-curvature on described 5th eyeglass two sides, R13 and R14 is respectively the radius-of-curvature on described 6th eyeglass two sides,
T is lens thickness, T1 is the thickness of described first eyeglass, T2 is the thickness of described second eyeglass, T3a is the thickness of the described biconvex lens of described 3rd eyeglass, T3b is the thickness of the described biconcave lens of described 3rd eyeglass, and T4a is the thickness of the described biconcave lens of described 4th eyeglass, and T4b is the thickness of the described biconvex lens of described 4th eyeglass, T5 is the thickness of described 5th eyeglass, and T6 is the thickness of described 6th eyeglass;
D is the spacing distance between eyeglass, D1 is the spacing distance between described first eyeglass and described second eyeglass, D2 is the spacing distance between described second eyeglass and described 3rd eyeglass, D3 is the spacing distance between described 3rd eyeglass and described 4th eyeglass, D4 is the spacing distance between described 4th eyeglass and described 5th eyeglass, and D5 is the spacing distance between described 5th eyeglass and described 6th eyeglass.
5. endoscope-use shooting adapter optical system according to claim 2, is characterized in that wherein said first eyeglass and described 6th eyeglass are optics sapphire window.
6. endoscope-use shooting adapter optical system according to claim 1, is characterized in that wherein said biconcave lens is refractive index 1.6, the flint glass lens of dispersive power 35.
7. endoscope-use shooting adapter optical system according to claim 1, it is characterized in that the described meniscus lens of wherein said second eyeglass and the described biconvex lens of described 3rd eyeglass are refractive index 1.75, the crown glass lens containing group of the lanthanides of dispersive power 45.
8. endoscope-use according to claim 1 shooting adapter optical system, it is characterized in that the refractive index of the described biconvex lens of wherein said second eyeglass, described 3rd eyeglass, the described biconvex lens of described 4th eyeglass and described 5th eyeglass and dispersive power than the refractive index of the described biconcave lens of described 3rd eyeglass and described 4th eyeglass and dispersive power high.
9. endoscope-use shooting adapter optical system according to claim 8, it is characterized in that refractive index and the dispersive power of wherein said second eyeglass and described 5th eyeglass are identical, the described biconvex lens of described 3rd eyeglass is identical with the refractive index of the described biconvex lens of described 4th eyeglass and dispersive power; Or
Described in the refractive index ratio of described 5th eyeglass, the refractive index of the second eyeglass is high, and described in the refractive index ratio of the described biconvex lens of described 4th eyeglass, the refractive index of the described biconvex lens of the 3rd eyeglass is high.
10. the endoscope-use shooting adapter optical system according to claim arbitrary in claim 1 to 9, it is characterized in that between wherein said second eyeglass and described 3rd eyeglass by the first spacer ring interval, be arranged in the first sleeve, by the second spacer ring interval between described 4th eyeglass and described 5th eyeglass, be arranged in the second sleeve; Described first sleeve is arranged in described second sleeve, and its one end is near described 4th eyeglass, and the other end is compressed by trim ring.
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| CN201410184450.0A CN104345429B (en) | 2014-05-04 | 2014-05-04 | Optical system of camera adapter for endoscope |
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| CN201410184450.0A CN104345429B (en) | 2014-05-04 | 2014-05-04 | Optical system of camera adapter for endoscope |
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| CN111880302A (en) * | 2020-06-28 | 2020-11-03 | 浙江大学 | Medical endoscopic optical zoom lens with high magnification and wide angle |
| CN114176483A (en) * | 2021-12-16 | 2022-03-15 | 重庆西山科技股份有限公司 | Polarized light endoscope device camera optical system, camera and endoscope device |
| CN115469418A (en) * | 2022-09-19 | 2022-12-13 | 北京创思工贸有限公司 | Laser lens assembly method and laser lens |
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| CN115469418A (en) * | 2022-09-19 | 2022-12-13 | 北京创思工贸有限公司 | Laser lens assembly method and laser lens |
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