CN103389556A - Lens device - Google Patents
Lens device Download PDFInfo
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- CN103389556A CN103389556A CN2013101684723A CN201310168472A CN103389556A CN 103389556 A CN103389556 A CN 103389556A CN 2013101684723 A CN2013101684723 A CN 2013101684723A CN 201310168472 A CN201310168472 A CN 201310168472A CN 103389556 A CN103389556 A CN 103389556A
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Abstract
Provided is a lens device which does not have special requirements on temperatures of usage environments and can prevent dew formation on a lens. The lens device (300) is connected with a pick-up device in a free assemble-and-disassemble manner, wherein the pick-up device shoots an object to generate image data of the object. The lens device (300) has a lens frame (310) which enables the optical axes of plural lenses to have the plural lenses accommodated and fixed in the internal part, a first lens (320) which is fixed at one end of the lens frame (310), a second lens (330) which is fixed at the central part of the optical axis direction of the lens frame (310), and a third lens (340) which is fixed at the other end of the lens frame (310). The lens frame (310) has a connection hole (318) for connecting a first room (K1) and a second room (K2), the ratio of the superficial area of the outer surface of the lens frame (310) to the volume of the lens frame (310) is larger than 4.
Description
Technical field
The present invention relates to can be with respect to subject being made a video recording and generating the camera head disassembled and assembled freely of the view data of this subject, and from the lens assembly of predetermined area of visual field optically focused.
Background technology
In recent years, in the camera heads such as digital camera or Digital Video, known can being arranged on lens barrel, and can be at the first-class lens assembly of the conversion mirror that the wide-angle side is photographed (with reference to patent documentation 1) than the focal length of built-in optical system.In this technology, the lens more than two are accommodated in lens frame filling nitrogen etc. between adjacent lens.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2011-221300 communique
Summary of the invention
The problem that invention will solve
Yet there are the following problems in above-mentioned lens assembly: according to the temperature of environment for use, the moisture that comprises in the inside of lens frame becomes state of saturation, produces thus dewfall on lens.
The present invention completes just in view of the above problems, and its purpose is, provides a kind of and can have nothing to do in the temperature of environment for use, prevents from producing the lens assembly of dewfall on lens.
Be used for the means of dealing with problems
In order to solve above-mentioned problem and to reach purpose, lens assembly of the present invention generates the view data of this subject with subject is made a video recording camera head is connected in mode that can disassembled and assembled freely, this lens assembly is characterised in that, have: lens frame, it as one man should take in and fix by a plurality of lens the optical axis of a plurality of lens in internal arrangement; The 1st lens, its end in described lens frame is fixed; The 2nd lens, its pars intermedia at the optical axis direction of described lens frame is fixed; And the 3rd lens, its other end in described lens frame is fixed, described lens frame has the connecting hole that connects the 1st space and the 2nd space, the 1st space is formed between described the 1st lens and described the 2nd lens, the 2nd space is formed between described the 2nd lens and described the 3rd lens, with the surface area of the outside surface of this lens frame, divided by the value that the volume of this lens frame obtains, is more than 4.
In addition, lens assembly of the present invention in foregoing invention, is characterized in that, has: the 1st filling component, and it is circular, is located between described the 1st lens and described lens frame, fills the gap between described the 1st lens and described lens frame; The 2nd filling component, it is circular, is located between described the 3rd lens and described lens frame, fills the gap between described the 3rd lens and described lens frame; The 1st fixed part, it is pressed described the 1st lens and with respect to described lens frame, be fixed to the other end direction of described lens frame between described the 1st lens and described lens frame; And the 2nd fixed part, it is pressed described the 3rd lens and with respect to described lens frame, be fixed to an extreme direction of described lens frame between described the 3rd lens and described lens frame.
In addition, lens assembly of the present invention in foregoing invention, is characterized in that, described lens frame is circular cone shape, and this frustum of a cone has inside all sides crooked inclined-plane projectedly.
In addition, lens assembly of the present invention in foregoing invention, is characterized in that, described the 1st lens form plane from the surface that described lens frame is exposed, and described the 3rd lens form plane from the surface that described lens frame is exposed.
In addition, lens assembly of the present invention in foregoing invention, is characterized in that, this lens assembly is the wide-angle breakout box.
The effect of invention
Lens assembly of the present invention forms, lens frame has the connecting hole that connects the 1st space and the 2nd space, the 1st space is formed between the 1st lens and the 2nd lens, the 2nd space is formed between the 2nd lens and the 3rd lens, with the surface area of the outside surface of lens frame, divided by the value that the volume of lens frame obtains, is more than 4.Produce thus following effect: can have nothing to do in the temperature of environment for use, prevent from producing dewfall in the 1st lens.
Description of drawings
Fig. 1 observes at camera head and the lens assembly of embodiments of the present invention 1 has been installed and the stereographic map of the outward appearance of the camera system that obtains from front face side.
Fig. 2 has installed the lens assembly of embodiments of the present invention 1 and the side view of the camera system that obtains on camera head.
Fig. 3 has installed the lens assembly of embodiments of the present invention 1 and the rear view of the camera system that obtains on camera head.
Fig. 4 is the A-A line cut-open view of Fig. 1.
Fig. 5 is the front view from front face side sight glass head lens barrel unit.
Fig. 6 is the B-B line cut-open view of Fig. 5.
Fig. 7 is the cut-open view of the lens assembly of embodiments of the present invention 1.
Fig. 8 is the cut-open view of the lens assembly of embodiments of the present invention 2.
Fig. 9 is the cut-open view of lens assembly of the variation 1 of embodiments of the present invention 2.
Figure 10 is the cut-open view of lens assembly of the variation 2 of embodiments of the present invention 2.
Figure 11 is the cut-open view of the lens assembly of embodiments of the present invention 3.
Figure 12 is the cut-open view of the lens assembly of embodiments of the present invention 4.
Figure 13 is the figure of parameter that the lens frame of various embodiments of the present invention and each comparative example is shown.
Figure 14 is the figure of analysis result that the temperature of various embodiments of the present invention and each comparative example is shown.
Figure 15 is the cut-open view of the lens assembly of comparative example 1 of the present invention.
Figure 16 is the cut-open view of the lens assembly of comparative example 2 of the present invention.
Label declaration
1: camera system
100: camera head
101: installing ring
110: housing
120: the camera control substrate:
130: the lens barrel unit
200: adapter apparatus
201: rear side camera lens installing ring
202: slot part
300,400,420,430,500,600,700,800: lens assembly
301,401,501,601: jut
310,410,421,431,510,610,710,810: lens frame
310a, 410a, 42la, 43la, 510a, 610a, 710a, 810a: base end part
310b, 410b, 421b, 431b, 510b, 610b, 710b, 810b: tapering
310c, 410c, 421c, 431c, 510c, 610c, 710c, 810c: leading section
311,411,511,611: the 1 fixed parts
312,412,512,612: the 2 fixed parts
313,413,513,613: the 3 fixed parts
314,414,514,614: the 4 fixed parts
315,415,515,615: the 5 fixed parts
316,416,516,616: the 6 fixed parts
317,417,517,617: the 7 fixed parts
318,418,518,618: connecting hole
319,701,819: dip plane
320: the 1 lens
330: the 2 lens
340: the 3 lens
Pressed pressure ring in 350: the 1
Pressed pressure ring in 360: the 2
370: the 1O rings
380: the 2O rings
K1: the 1st space
K2: the 2nd space
Embodiment
Describe being used for implementing mode of the present invention (below, be called " embodiment ") referring to accompanying drawing.In addition, the invention is not restricted to this embodiment.In addition, in the record of accompanying drawing, identical part is marked identical label.In addition, accompanying drawing is schematically, should be noted that the thickness of each parts is different with reality from the relation of width, the ratio of each parts etc.In addition, also comprise each other size or the different part of ratio between each accompanying drawing.
(embodiment 1)
Fig. 1 observes the stereographic map of the outward appearance of the camera system of the lens assembly of embodiments of the present invention 1 being installed and obtaining camera head from front face side.Fig. 2 has installed the lens assembly of embodiments of the present invention 1 and the side view of the camera system that obtains in camera head.Fig. 3 has installed the lens assembly of embodiments of the present invention 1 and the rear view of the camera system that obtains in camera head.Fig. 4 is the A-A line cut-open view of Fig. 1.In addition, in Fig. 1～Fig. 4, as the intrinsic coordinate system of camera head, with the Width of camera head as the thickness direction of X-axis, camera head as the vertical direction of Y-axis, camera head as Z axis.In addition, in Fig. 1～Fig. 4, object side is described as rear side as front side, cameraman (back side) side.
Fig. 1～camera system 1 shown in Figure 4 has: camera head 100, and it is made a video recording to subject, generates the view data of this subject; Adapter apparatus 200, its mode with detachable is arranged on camera head 100; And lens assembly 300, it is arranged on camera head 100 via the mode of adapter apparatus 200 with detachable.The rear side camera lens installing ring 201 of the rear side by will be located at adapter apparatus 200 be located at installing ring 101 combinations of the front side of camera head 100, thereby adapter apparatus 200 is arranged on camera head 100.The jut 301 of the rear side by will be located at lens assembly 300 is chimeric with the slot part 202 of the front side of being located at adapter apparatus 200, thereby lens assembly 300 is arranged on adapter apparatus 200.Thus, camera head 100, adapter apparatus 200 and lens assembly 300 are connected to one.In addition, above-mentioned installing ring is for example that bayonet type gets final product.
At first, the structure of camera head 100 described.Camera head 100 has: be the roughly housing 110 of the box shape of Nogata body; Be accommodated in housing 110 and the camera control substrate 120 that camera head 100 is carried out various controls; And has a lens barrel unit 130 for the bending optical system that subject is made a video recording.
Be provided with in cover 111 in front: photography window component 111a, it is used for making the subject light beam internally to be placed in interior lens barrel unit 130 incidents of housing 110; And the illuminating window 111b of section, it makes the light outgoing of flashlamp light-emitting device (not shown).In addition, the upper surface of cover 111 is provided with in front: power switch 111c, and its electrical source exchange with camera head 100 becomes on-state or off-state; And release-push 111d, it is to camera head 100 indication photography actions.
Be provided with on cover 112 in the back: the 112a of operating switch section that photograph mode or actions menu etc. is set; The 112b of Zoom switch section that the zoom ratio of camera head 100 is changed; By liquid crystal or organic EL(Electro Luminescence: the display part 112c of the image that the display panel formation that electroluminescence) forms and demonstration are corresponding with view data; Prevent from producing at display part 112c because of external force the 112d of display window section that impacts.
Camera control substrate 120 uses printed base plate and forms.camera control substrate 120 has been installed on printed base plate: carry out the indication corresponding with each one that forms camera head 100 or data transmission etc. and also control the CPU(Central Processing Unit of the action of camera head 100 blanketly: CPU (central processing unit)), control the flashlamp light emitting control section of flash unit, view data is carried out the image processing part (image processing engine) that image is processed, write recording control part and the shaking detection sensor of view data in the recording mediums such as storage card.
The area of visual field optically focused of lens barrel unit 130 from being scheduled to, thus receive the light of assembling and carry out the opto-electronic conversion image data generating.At this, the structure of lens barrel unit 130 is described.Fig. 5 is the front view from front face side sight glass head lens barrel unit 130.Fig. 6 is the B-B line cut-open view of Fig. 5.In addition, in Fig. 6, left side is front face side, and right side is rear side.
As shown in Figure 5 and Figure 6, lens barrel unit 130 has: from the optical system 131 of predetermined area of visual field optically focused; Thereby the light that receiving optics 131 is assembled and the image unit 132 that carries out the opto-electronic conversion image data generating; Take in the lens frame 133 of optical system 131 and image unit 132; And the damper elements 134 that relaxes the impact that external force applies lens frame 133.
Detailed construction to optical system 131 describes.Optical system 131 has towards the imaging side successively from the light incident side of subject light beam incident: have optical element 131a(reflection part) the 1st lens combination G1 of negative refractive power; Be configured in the 2nd lens combination G2 of the positive refractive power on the 2nd optical axis L 2; Be configured in the 3rd lens combination G3 of the negative refractive power on the 2nd optical axis L 2; Be configured between the 2nd lens combination G2 and the 3rd lens combination G3, and the setting state of image unit 132 become the shutter 131b of exposure status or shading status; And the 4th lens combination G4 that is configured in the positive refractive power on the 2nd optical axis L 2.
The 1st lens combination G1 uses double-concave negative lens r11, optical element 131a, convex surface to form towards the positive concave-convex lens r12 of object side.The 1st lens combination G1 disposes double-concave negative lens r11, optical element 131a and positive concave-convex lens r12 along the 1st optical axis L 1 and the 2nd optical axis L 2 successively from the object side device.The 2nd lens combination G2 uses biconvex lens r21, convex surface to form towards joint lens r23, the biconvex positive lens r24 of the negative meniscus lens of object side towards positive concave-convex lens r22, the convex surface of object side.The 2nd lens combination G2 disposes successively biconvex lens r21, positive concave-convex lens r22, engages lens r23 and biconvex positive lens r24 along the 2nd optical axis L 2 from object side.The 3rd lens combination G3 uses convex surface to form towards the negative meniscus lens r31 of object side.The 4th lens combination G4 uses biconvex positive lens r41 and forms.
The 2nd fixed frame 133b has the 2nd frame 133c that keeps the 2nd lens combination G2, the 3rd frame 133d that keeps the 3rd lens combination G3 and the 4th frame 133e that keeps the 4th lens combination G4.The 2nd frame 133c, the 3rd frame 133d and the 4th frame 133e are being maintained in lens frame 133 along the mode of the 2nd optical axis L 2 advance and retreat.The 2nd frame 133c, the 3rd frame 133d and the 4th frame 133e move on the 2nd optical axis L 2 directions by the driving mechanisms such as stepper motor (not shown).Camera head 100 makes the 4th lens combination G4 mobile along the 2nd optical axis L 2 advance and retreat via the 4th frame 133e when carrying out focus operation, can take thus in focus the image on subject.In addition, camera head 100 drives driving mechanism (not shown) when carrying out the zoom action, the 2nd lens combination G2 of the 2nd frame 133c and the 3rd lens combination G3 of the 3rd frame 133d are moved along the 2nd optical axis L 2 advance and retreat, thus the multiplying power of the optical zoom of change from wide-angle side to telescope end.
Return to Fig. 1～Fig. 4, adapter apparatus 200 is described.Adapter apparatus 200 is circular, has rear side camera lens installing ring 201 and slot part 202.Implemented screw chasing on the part of the inner face of slot part 202.Thus, adapter apparatus 200 can dismounting be installed lens assembly 300 described later freely.
Then, lens assembly 300 is described.Fig. 7 is the cut-open view of lens assembly 300.In addition, in Fig. 7, left side is described as rear side as front side, right side.
In addition, the inner face in lens frame 310 is provided with: fix the 1st lens 320 the 1st fixed part 311, fix the 2nd lens 330 the 2nd fixed part 312, fix the 3rd lens 340 the 3rd fixed part 313, fix 1O ring 370 the 4th fixed part 314, fix the 1st the 5th fixed part 315 by pressure ring 350, fix the 6th fixed part 316 of 2O ring 380 and fix the 2nd the 7th fixed part 317 by pressure ring 360.The 1st fixed part 311～the 7th fixed part 317 diameter and the 1st lens 320, the 2nd lens 330, the 3rd lens 340, the 1st separately form accordingly by pressure ring 350, the 2nd external diameter by pressure ring 360,1O ring 370 and 2O ring 380.For example, it is roughly consistent with the external diameter of the 1st lens 320 that the 1st fixed part 311 forms the diameter of its inner face, and cross section is roughly C word shape.In addition, at the 2nd fixed part 312, be provided with a plurality of connecting holes 318, it connects the 1st space K1 and the 2nd space K2, and wherein the 1st space K1 is formed between the 1st lens 320 and the 2nd lens 330, and the 2nd space K2 is formed between the 2nd lens 330 and the 3rd lens 340.
In addition, the outside surface of the tapering 310b in lens frame 310 is provided with the dip plane 319 of bending smoothly of having implemented R processing and having obtained, and the jut 301 chimeric with the slot part 202 of adapter apparatus 200.The outside surface of jut 301 has been implemented screw chasing.
The 1st lens 320 are to use such as pyroconductivity to be 0.85W/(mk) glass etc. form.The 1st lens 320 are to use the face that exposes from lens frame 310 to be plane, and the negative lens that another face is concave surface forms.The 1st lens 320 are supported and are fixed by the stationary plane 31la of the 1st fixed part 311.In addition, be formed with the slot part 320a that is circular and keeps 1O ring 370 in the 1st lens 320.
The 2nd lens 330 are to use pyroconductivity to be 0.90W/(mk) glass etc. form.The 2nd lens 330 are to use a face to be plane, and the negative lens that another face is concave surface forms.The 2nd lens 330 are supported and are fixed by the stationary plane 312a of the 2nd fixed part 312.
The 3rd lens 340 are to use pyroconductivity to be 1.02W/(mk) glass etc. form.The 3rd lens 340 are to use the face that exposes from lens frame 310 to be plane, and the positive lens that another face is convex surface forms.The 3rd lens 340 are supported and are fixed by the stationary plane 313a of the 3rd fixed part 313.In addition, be formed with the slot part 340a that is circular and keeps 2O ring 370 in the 3rd lens 340.
The 1st by pressure ring 350 such as by pyroconductivity, being 137W/(mk) the such metal of aluminium or the globular graphite of high-termal conductivity or contain the synthetic resin (such as polyphenylene sulfide (PPS) resin 2W/(mk) of carbon fiber more than) etc. formation, be circular.The 1st has from the interior 350a of jut facing to umbo by pressure ring 350.The 1st presses pressure ring 350 between the 1st lens 320 and lens frame 310, and the 1st lens 320 are pressed and with respect to lens frame 310, fixed to the rear side (other end direction) of lens frame 310.Particularly, the 1st 350a of the jut by pressure ring 350 presses the 1st lens 320 and with respect to lens frame 310, fix to the rear side of lens frame 310.In addition, in present embodiment 1, the 1st plays a role as the 1st fixed part by pressure ring 350.
The 2nd by pressure ring 360 such as by pyroconductivity, being 137W/(mk) the such metal of aluminium or the globular graphite of high-termal conductivity or contain the synthetic resin (such as polyphenylene sulfide (PPS) resin 2W/(mk) of carbon fiber more than) etc. formation, be circular.The 2nd has from a face and forms circular jut 360a by pressure ring 360.The 2nd presses pressure ring 360 between the 3rd lens 340 and lens frame 310, and the 3rd lens 340 are pressed and with respect to lens frame 310, fixed to the front side (extreme direction) of lens frame 310.Particularly, the 2nd 360a of the jut by pressure ring 360 presses the 3rd lens 340 and with respect to lens frame 310, fix to the front side of lens frame 310.In addition, in present embodiment 1, the 2nd plays a role as the 2nd fixed part by pressure ring 360.
Use the pyroconductivities such as ethylene/propene/ethylene-propylene-diene rubber (EPDM) of high-termal conductivity to be 0.36W/(mk as the 1O of seal member ring 370) resin form, be circular.1O ring 370 is located between the 1st lens 320 and lens frame 310, fills the gap between the 1st lens 320 and lens frame 310.In addition, in present embodiment 1,1O ring 370 plays a role as the 1st filling component.
Use the pyroconductivities such as ethylene/propene/ethylene-propylene-diene rubber (EPDM) of high-termal conductivity to be 0.36W/(mk as the 2O of seal member ring 380) resin form, be circular.2O ring 380 between the 3rd lens 340 and lens frame 310, is filled the gap between the 3rd lens 340 and lens frame 310.In addition, in present embodiment 1,2O ring 380 plays a role as the 2nd filling component.
In the lens assembly 300 that forms like this, at first, with bonding agent, the 2nd lens 330 are fixed on the 2nd fixed part 312 of lens frame 310, then, with bonding agent, the 1st lens 320 are fixed on the 1st fixed part 311 of lens frame 310.Then, 1O ring 370 is inserted the 4th fixed part 314 and slot part 320a, then with bonding agent, be fixed.Then,, being fixed in the 5th fixed part 315 with the 1st by pressure ring 350 and pressing by jut 350a under the state of front side of the 1st lens 320, with screw (not shown) etc., be fixed on lens frame 310.
Then, the 3rd lens 340 are inserted into lens frame 310 from rear side, with bonding agent, are fixed on the 3rd fixed part 313.Then, 2O ring 380 is inserted in lens frame 310, and is inserted in the 6th fixed part 316 and slot part 340a, then with bonding agent, be fixed.Then,, being fixed to the 7th fixed part 317 with the 2nd by pressure ring 360 and pressing by jut 360a under the state of rear side of the 3rd lens 340, with screw (not shown) etc., be fixed on lens frame 310.Thus, the inside of lens frame 310 becomes the watertight state, can prevent that sealing etc. immerses from outside.In addition, the face that exposes from lens frame 310 of the 1st lens 320 and the 3rd lens 340 forms plane, therefore, can prevent scar that external force causes etc.In addition, lens assembly 300 plays a role as the wide-angle conversion lens.
The lens assembly 300 of embodiments of the present invention 1 described above forms has connecting hole 318, when lens frame 310 is taken in respectively the 1st lens 320, the 2nd lens 330 and the 3rd lens 340 successively from object side, this connect apertures 318 connects the 1st space K1 and the 2nd space K2, be more than 4 with the surface area of the outside surface of lens frame 310 divided by the value that the volume of lens frame 310 obtains, therefore, can have nothing to do in the temperature of environment for use, prevent from producing dewfall in the 1st lens 320.
(embodiment 2)
Then, embodiments of the present invention 2 are described.The lens assembly of present embodiment 2 and the difference of above-mentioned embodiment only are the shape of lens frame.Therefore, below only the structure to the lens assembly of present embodiment 2 describe.In addition, the structure mark identical label identical with above-mentioned embodiment 1 described.
Fig. 8 is the cut-open view of the lens assembly of present embodiment 2.In addition, in Fig. 8, left side is described as rear side as front side, right side.
In addition, the inner face in lens frame 410 is provided with: fix the 1st lens 320 the 1st fixed part 411, fix the 2nd lens 330 the 2nd fixed part 412, fix the 3rd lens 340 the 3rd fixed part 413, fix 1O ring 370 the 4th fixed part 414, fix the 1st the 5th fixed part 415 by pressure ring 350, fix the 6th fixed part 416 of 2O ring 380 and fix the 2nd the 7th fixed part 417 by pressure ring 360.The 1st fixed part 411～the 7th fixed part 417 diameter and the 1st lens 320, the 2nd lens 330, the 3rd lens 340, the 1st separately form accordingly by pressure ring 350, the 2nd external diameter by pressure ring 360,1O ring 370 and 2O ring 380.In addition, be provided with the connecting hole 418 of a plurality of connection the 1st space K1 and the 2nd space K2 on the 2nd fixed part 412.
In addition, be provided with on the outside surface of lens frame 410 with the dip plane 419 of level and smooth angular bend and the jut 401 chimeric with the slot part 202 of adapter apparatus 200.Outside surface at jut 401 has been implemented screw chasing.Implemented on the whole concavo-convex processing in the dip plane 419 that comprises tapering 410b at the outside surface of interior lens frame 410.Thus, the surface area of lens frame 410 is compared increase with volume, and pyroconductivity is excellent.
In embodiments of the present invention 2 described above, lens frame 410 has connecting hole 418, when lens frame 410 is taken in respectively the 1st lens 320, the 2nd lens 330 and the 3rd lens 340 successively from object side, this connecting hole 418 connects the 1st space K1 and the 2nd space K2, forming the surface area of the outside surface of lens frame 410 is more than 4 divided by the value that the volume of lens frame 410 obtains, therefore can have nothing to do in the temperature of environment for use, prevent from producing dewfall on the 1st lens 320.
(variation 1 of embodiment 2)
In embodiments of the present invention 2, implemented on the whole concavo-convex processing at the outside surface of lens frame 410, but also can only implement concavo-convex processing on the part of lens frame 410.Fig. 9 is the cut-open view of lens assembly of the variation 1 of present embodiment 2.Lens assembly 420 shown in Figure 9 has lens frame 421.Lens frame 421 is the roughly frustum of a cone that diminishes towards the rear side diameter from front side, is formed with in inside and is the roughly space of the frustum of a cone.Particularly, lens frame 421 has: be circular base end part 421a, in the mode that enlarges towards the straight outer radial periphery side of front side from rear side, be formed with the tapering 421b of the dip plane that inside all sides tilt projectedly and be circular leading section 421c.Lens frame 421 forms in the mode that base end part 421a, tapering 421b and leading section 421c connect continuously.In addition, implemented concavo-convex processing on the part of the outside surface of tapering 421b.Particularly, the concavo-convex processing of implementing at the outside surface of tapering 421b is to implement on the outside surface between the 2nd lens 330 and the 3rd lens 340.Thus, the surface area of lens frame 421 is compared increase with volume, and pyroconductivity is excellent.
(variation 2 of embodiment 2)
Figure 10 is the cut-open view of lens assembly of the variation 2 of present embodiment 2.Lens assembly 430 shown in Figure 10 has lens frame 431.Lens frame 431 is the roughly frustum of a cone that diminishes towards the rear side diameter from front side, is formed with in inside and is the roughly space of the frustum of a cone.Particularly, lens frame 431 has: be circular base end part 431a, with the mode that enlarges towards the straight outer radial periphery side of front side from rear side be formed with inside all sides projectedly crooked dip plane tapering 431b and be circular leading section 431c.Lens frame 431 forms in the mode that base end part 431a, tapering 431b and leading section 431c connect continuously.In addition, implemented concavo-convex processing at the outside surface of tapering 431b.Thus, the surface area of lens frame 431 is compared increase with volume, and pyroconductivity is excellent.
(embodiment 3)
Then, embodiments of the present invention 3 are described.The difference of the lens assembly of present embodiment 3 and above-mentioned embodiment only is the shape of lens frame.Therefore, below only the structure to the lens assembly of present embodiment 3 describe.In addition, the identical identical label of structure mark of the embodiment 1 with above-mentioned is described.
Figure 11 is the cut-open view of the lens assembly of present embodiment 3.In addition, in Figure 11, left side is described as rear side as front side, right side.
In addition, the inner face in lens frame 510 is provided with: fix the 1st lens 320 the 1st fixed part 511, fix the 2nd lens 330 the 2nd fixed part 512, fix the 3rd lens 340 the 3rd fixed part 513, fix 1O ring 370 the 4th fixed part 514, fix the 1st the 5th fixed part 515 by pressure ring 350, fix the 6th fixed part 516 of 2O ring 380 and fix the 2nd the 7th fixed part 517 by pressure ring 360.The 1st fixed part 511～the 7th fixed part 517 diameter and the 1st lens 320, the 2nd lens 330, the 3rd lens 340, the 1st separately form accordingly by pressure ring 350, the 2nd external diameter by pressure ring 360,1O ring 370 and 2O ring 380.In addition, be provided with the connecting hole 518 of a plurality of connection the 1st space K1 and the 2nd space K2 on the 2nd fixed part 512.
In addition, be provided with on the outside surface of lens frame 510 with the dip plane 519 of level and smooth angle inclination and the jut 501 chimeric with the slot part 202 of adapter apparatus 200.Outside surface at jut 501 has been implemented screw chasing.In addition, the dip plane 519 of tapering 510b is compared and is formed thinlyyer with other side.Thus, the surface area of lens frame 510 is compared increase with volume.
In embodiments of the present invention 3 described above, lens frame 510 has connecting hole 518, while in lens frame 510, taking in successively the 1st lens 320, the 2nd lens 330 and the 3rd lens 340 from object side, this connecting hole 518 connects the 1st space K1 and the 2nd space K2, forming the surface area of the outside surface of lens frame 510 is more than 4 divided by the value that the volume of lens frame 510 obtains, the dip plane 519 of tapering 510b is compared and is formed thinlyyer with other side, therefore, can have nothing to do in the temperature of environment for use, prevent from reliably producing dewfall in the 1st lens 320.
(embodiment 4)
Then, embodiments of the present invention 4 are described.The difference of the lens assembly of present embodiment 4 and above-mentioned embodiment only is the shape of lens frame.Therefore, below only the structure to the lens assembly of present embodiment 4 describe.In addition, the structure mark identical label identical to the embodiment 1 with above-mentioned.
Figure 12 is the cut-open view of the lens assembly of present embodiment 4.In addition, in Figure 12, left side is described as rear side as front side, right side.
In addition, the inner face in lens frame 610 is provided with: fix the 1st lens 320 the 1st fixed part 611, fix the 2nd lens 330 the 2nd fixed part 612, fix the 3rd lens 340 the 3rd fixed part 613, fix 1O ring 370 the 4th fixed part 614, fix the 1st the 5th fixed part 615 by pressure ring 350, fix the 6th fixed part 616 of 2O ring 380 and fix the 2nd the 7th fixed part 617 by pressure ring 360.The 1st fixed part 611～the 7th fixed part 617 diameter and the 1st lens 320, the 2nd lens 330, the 3rd lens 340, the 1st separately form accordingly by pressure ring 350, the 2nd external diameter by pressure ring 360,1O ring 370 and 2O ring 380.In addition, be provided with the connecting hole 618 of a plurality of connection the 1st space K1 and the 2nd space K2 on the 2nd fixed part 612.
In addition, be provided with on the outside surface of lens frame 610 with the aduncate dip plane 619 of level and smooth angle and the jut 601 chimeric with the slot part 202 of adapter apparatus 200.Outside surface at jut 601 has been implemented screw chasing.In addition, the dip plane 619 of lens frame 610 is compared and is formed thinlyyer with other side.In addition, implemented concavo-convex processing in the dip plane 619 that comprises tapering 610b at the outside surface of interior lens frame 610.Thus, the surface area of lens frame 610 is compared increase with volume.
In embodiments of the present invention 4 described above, lens frame 610 has the connecting hole 618 that connects the 1st space K1 and the 2nd space K2, forming the surface area of the outside surface of lens frame 610 is more than 4 divided by the value that the volume of lens frame 610 obtains, dip plane 619 is compared and is formed thinlyyer and implemented concavo-convex processing with other side, therefore, can have nothing to do in the temperature of environment for use, prevent from reliably producing dewfall on the 1st lens 320.
[embodiment]
Below, as embodiments of the invention, the analog result corresponding with each above-mentioned embodiment described.Figure 13 is the figure that the parameter value of the lens frame in embodiments of the invention and comparative example is shown.Figure 14 is the figure of analysis result that the temperature of various embodiments of the present invention and each comparative example is shown.In Figure 14, transverse axis represents the value that the surface area of the outside surface of lens frame is obtained divided by the volume of this lens frame, on the other hand, the longitudinal axis is illustrated in the temperature that makes lens assembly to be become after 40 ℃ in the environment that moves to-10 ℃, after movement through lens frame 420 seconds time the and the temperature difference between the 1st lens 320 (below, referred to as temperature difference).Below, with reference to Figure 13 and Figure 14, embodiments of the invention 1～6 and comparative example 1～2 are described.
(embodiment 1)
L describes to embodiments of the invention.In the present embodiment 1, in the shape of the lens assembly 300 of above-mentioned embodiment 1, the surface area that the minimum thickness of tapering 310b is made as the outside surface of 2.21mm, lens frame 310 is made as 62.0cm
2, lens frame 310 volume be made as 15.0cm
3, and the thickness of the central part of the 1st lens 320 be made as 1.8mm.4.13 with the surface area of the outside surface of lens frame 310 divided by the value that the volume of lens frame 310 obtains.The result of simulating under above condition, temperature difference are 0.9 ℃, in the 1st lens 320, dewfall do not occur.In Figure 14, the result of the present embodiment 1 is represented by a P1.
(embodiment 2)
Then, embodiments of the invention 2 are described.The present embodiment 2 in the shape of the lens assembly 400 of above-mentioned embodiment 2, is made as the concavo-convex thickness of 2.5mm(with the minimum thickness of tapering 410b and is made as 1mm), the surface area of the outside surface of lens frame 410 is made as 307cm
2, lens frame 410 volume be made as 16.9cm
3, and the thickness of the central part of the 1st lens 320 be made as 1.8mm.18.17 with the surface area of the outside surface of lens frame 410 divided by the value that the volume of lens frame 410 obtains.The result of simulating under above condition, temperature difference are-8.8 ℃, in the 1st lens 320, dewfall do not occur.In Figure 14, the result of the present embodiment 2 is represented by a P5.
(embodiment 3)
Then, embodiments of the invention 3 are described.The present embodiment 3 in the shape of the lens assembly 420 of the variation 1 of above-mentioned embodiment 2, is made as the concavo-convex thickness of 2.5mm(with the minimum thickness of tapering 421b and is made as 1mm), the surface area of the outside surface of lens frame 421 is made as 145cm
2, lens frame 421 volume be made as 16.9cm
3, and the thickness of the central part of the 1st lens 320 be made as 1.8mm.8.58 with the surface area of the outside surface of lens frame 421 divided by the value that the volume of lens frame 421 obtains.The result of simulating under above condition, temperature difference are-3.8 ℃, in the 1st lens 320, dewfall do not occur.In Figure 14, the result of the present embodiment 3 is represented by a P3.
(embodiment 4)
Then, embodiments of the invention 4 are described.The present embodiment 4 in the shape of the lens assembly 430 of the variation 2 of above-mentioned embodiment 2, is made as the concavo-convex thickness of 2.5mm(with the minimum thickness of tapering 431b and is made as 1mm), the surface area of the outside surface of lens frame 431 is made as 199cm
2, lens frame 431 volume be made as 16.9cm
3, and the thickness of the central part of the 1st lens 320 be made as 1.8mm.11.78 with the surface area of the outside surface of lens frame 431 divided by the value that the volume of lens frame 431 obtains.The result of simulating under above condition, temperature difference are-6.1 ℃, in the 1st lens 320, dewfall do not occur.In Figure 14, the result of the present embodiment 4 is by a P4.
(embodiment 5)
Then, embodiments of the invention 5 are described.The present embodiment 5 in the shape of the lens assembly 500 of above-mentioned embodiment 3, with the minimum thickness of tapering 510b be made as 0.47, the surface area of the outside surface of lens frame 510 is made as 56.9cm
2, lens frame 510 volume be made as 8.53cm
3, and the thickness of the central part of the 1st lens 320 be made as 1.8mm.6.67 with the surface area of the outside surface of lens frame 510 divided by the value that the volume of lens frame 510 obtains.The result of simulating under above condition, temperature difference are-0.2 ℃, in the 1st lens 320, dewfall do not occur.In Figure 14, the result of the present embodiment 5 is represented by a P2.
(embodiment 6)
Then, embodiments of the invention 6 are described.The present embodiment 6 in the shape of the lens assembly 600 of above-mentioned embodiment 4, is made as the concavo-convex thickness of 1.5(with the minimum thickness of tapering 610b and is made as 1mm), the surface area of the outside surface of lens frame 610 is made as 286cm
2, lens frame 610 volume be made as 10.8cm
3, and the thickness of the central part of the 1st lens 320 be made as 1.8mm.26.48 with the surface area of the outside surface of lens frame 610 divided by the value that the volume of lens frame 610 obtains.The result of simulating under above condition, temperature difference are-9.6 ℃, in the 1st lens 320, dewfall do not occur.In Figure 14, the result of the present embodiment 6 is represented by a P6.
(comparative example 1)
Then, comparative example 1 of the present invention is described.Figure 15 is the cut-open view of the lens assembly of comparative example 1 of the present invention.In addition, only the different part of embodiment 1 from above-mentioned is described below.In addition, the identical identical label of structure mark of the embodiment 1 with above-mentioned is described.
Lens assembly 700 shown in Figure 15 is compared with the lens assembly 300 of above-mentioned embodiment 1, and dip plane 701 forms thicklyer.Particularly, dip plane 701 is the states that do not carry out R processing, linearly.
In the shape of the lens assembly 700 of the comparative example 1 that forms like this, the surface area that the minimum thickness of tapering 710b is made as the outside surface of 2.54mm, lens frame 710 is made as 61.8cm
2, lens frame 710 volume be made as 17.1cm
3, and the thickness of the central part of the 1st lens 320 be made as 1.8mm.3.61 with the surface area of the outside surface of lens frame 710 divided by the value that the volume of lens frame 710 obtains.The result of simulating under above condition, temperature difference are 1.3 ℃, have produced dewfall in the 1st lens 320.In Figure 14, the result of this comparative example 1 is represented by a R1.
(comparative example 2)
Then, comparative example 2 of the present invention is described.Figure 16 is the cut-open view of the lens assembly of comparative example 2 of the present invention.In addition, only the different part of embodiment 2～4 from above-mentioned is described below.In addition, the identical identical label of structure mark of the embodiment 1 with above-mentioned is described.
In lens assembly shown in Figure 16 800, the dip plane 819 of the tapering 810b of lens frame 810 is compared and is formed thicklyer with the dip plane 419 of the tapering 410b of the lens frame 410 of the lens assembly 400 of embodiment 2.In addition, do not implement concavo-convex processing at the outside surface of the lens frame 810 of lens assembly 800.
In the shape of the lens assembly 800 of the comparative example 2 that forms like this, the surface area that the minimum thickness of tapering 810b is made as the outside surface of 2mm, lens frame 810 is made as 64.8cm
2, lens frame 810 volume be made as 16.9cm
3, and the thickness of the central part of the 1st lens 320 be made as 1.8mm.3.83 with the surface area of the outside surface of lens frame 810 divided by the value that the volume of lens frame 810 obtains.The result of simulating under above condition, temperature difference are 2 ℃, have produced dewfall in the 1st lens 320.In Figure 14, the result of this comparative example 2 is represented by a R2.
By embodiment 1～6 described above, comparative example 1～2 as can be known, if with the surface area of the outside surface of lens frame, divided by the value that the volume of this lens frame obtains, be more than 4, and in the temperature that makes lens assembly, become 40 ℃ of environment that later move to-10 ℃, after movement through lens frame 420 seconds time the and the temperature difference between the 1st lens 320 less than 1 ℃, can not produce dewfall in the 1st lens 320.
Claims (6)
1. lens assembly, its camera head that generates the view data of this subject with subject is made a video recording is connected in mode that can disassembled and assembled freely, and this lens assembly is characterised in that to have:
Lens frame, it as one man should take in and fix by a plurality of lens the optical axis of a plurality of lens in internal arrangement;
The 1st lens, its end in described lens frame is fixed;
The 2nd lens, its pars intermedia at the optical axis direction of described lens frame is fixed; And
The 3rd lens, its other end in described lens frame is fixed,
Described lens frame has the connecting hole that connects the 1st space and the 2nd space, the 1st space is formed between described the 1st lens and described the 2nd lens, the 2nd space is formed between described the 2nd lens and described the 3rd lens, with the surface area of the outside surface of this lens frame, divided by the value that the volume of this lens frame obtains, is more than 4.
2. lens assembly according to claim 1, is characterized in that, this lens assembly has:
The 1st filling component, it is circular, is located between described the 1st lens and described lens frame, fills the gap between described the 1st lens and described lens frame;
The 2nd filling component, it is circular, is located between described the 3rd lens and described lens frame, fills the gap between described the 3rd lens and described lens frame;
The 1st fixed part, it is pressed described the 1st lens and with respect to described lens frame, be fixed to the other end direction of described lens frame between described the 1st lens and described lens frame; And
The 2nd fixed part, it is pressed described the 3rd lens and with respect to described lens frame, be fixed to an extreme direction of described lens frame between described the 3rd lens and described lens frame.
3. lens assembly according to claim 1 and 2, is characterized in that,
Described lens frame is circular cone shape, and this frustum of a cone has inside all sides inclined-plane of bending projectedly.
4. lens assembly according to claim 1, is characterized in that,
The face that described the 1st lens expose from described lens frame forms plane,
The face that described the 3rd lens expose from described lens frame forms plane.
5. lens assembly according to claim 1, is characterized in that,
This lens assembly is the wide-angle breakout box.
6. lens assembly according to claim 1, is characterized in that,
also accompany between described the 1st lens and described lens frame and between the 3rd lens and described lens frame heat conductivity high by pressure ring and seal member.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012106220A JP6027766B2 (en) | 2012-05-07 | 2012-05-07 | Lens device |
| JP2012-106220 | 2012-05-07 | ||
| JP2012128323A JP6009826B2 (en) | 2012-06-05 | 2012-06-05 | Lens device |
| JP2012-128323 | 2012-06-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103389556A true CN103389556A (en) | 2013-11-13 |
| CN103389556B CN103389556B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310168472.3A Expired - Fee Related CN103389556B (en) | 2012-05-07 | 2013-05-06 | Lens device |
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| CN (1) | CN103389556B (en) |
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| TWI582480B (en) * | 2015-06-18 | 2017-05-11 | Quick dew dissipation of the lens module | |
| CN108037578A (en) * | 2018-01-10 | 2018-05-15 | 浙江舜宇光学有限公司 | Camera-lens system |
| CN111443411A (en) * | 2020-04-21 | 2020-07-24 | 南昌嘉研科技有限公司 | Two-way spectroscope |
| CN112859277A (en) * | 2021-02-26 | 2021-05-28 | 广州立景创新科技有限公司 | Lens module |
| TWI783388B (en) * | 2021-02-26 | 2022-11-11 | 大陸商廣州立景創新科技有限公司 | Lens module |
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| TWI582480B (en) * | 2015-06-18 | 2017-05-11 | Quick dew dissipation of the lens module | |
| CN108037578A (en) * | 2018-01-10 | 2018-05-15 | 浙江舜宇光学有限公司 | Camera-lens system |
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| CN112859277A (en) * | 2021-02-26 | 2021-05-28 | 广州立景创新科技有限公司 | Lens module |
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| TWI783388B (en) * | 2021-02-26 | 2022-11-11 | 大陸商廣州立景創新科技有限公司 | Lens module |
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|---|---|
| CN103389556B (en) | 2015-07-22 |
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