CN100454134C - Image sensing device and equipment thereof - Google Patents
Image sensing device and equipment thereof Download PDFInfo
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- CN100454134C CN100454134C CNB2004100858979A CN200410085897A CN100454134C CN 100454134 C CN100454134 C CN 100454134C CN B2004100858979 A CNB2004100858979 A CN B2004100858979A CN 200410085897 A CN200410085897 A CN 200410085897A CN 100454134 C CN100454134 C CN 100454134C
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Abstract
The invention provides an imaging unit capable of switching a prism unit to a 1st position and a 2nd position in accordance with the image pickup distance of a subject. The imaging unit 10 is equipped with the prism unit 30, an imaging device 12, a fixing member 13, a case member 14, a lever member (supporting member) 15, and a switching member 16 and a coupling spring 17 (switching mechanism). The unit 30 has at least two reflection surfaces formed as free curved surfaces. The lever member 15 supports the unit 30 movably within a specified movable range in an X direction. The switching member 16 selectively moves the unit 30 interlocked with the lever member 15 to the 1st position where the unit 30 is made to abut on the fixing member 13 and the 2nd position where the unit 30 is made to abut on the case member.
Description
Technical field
The present invention relates to be applicable to the camera head of the mobile phone etc. of digital camera, subsidiary camera, relate in particular to the prism of free form surface is adopted in use on reflecting surface etc. camera head, and the image sensing equipment that uses this camera head.
Background technology
In recent years, as the employed camera head of the mobile phone of digital camera and subsidiary camera, applied for the camera head of the optical system of the coaxial system of a lot of uses.So-called coaxial system is meant that optical element such as lens is configured to the rotational symmetric optical system of optical axis (axle that connects the center of the diaphragm of camera system and camera picture) with respect to optical system.For example following patent documentation 1～3 disclosed content of the camera head of coaxial system.
The nearest digital camera and the mobile phone of subsidiary camera are required miniaturization, slimming, high performance, have used in the camera head of optical system of coaxial system at these equipment, want to compress the size of camera head, must reduce the quantity of lens.But, if reduce the quantity of lens, then be difficult to suppress the aberration that optical system produced very little, make picture quality low.In addition, want to improve picture quality, must increase the quantity of lens, its result has produced camera head and has become big problem.
In order to address these problems, proposed to use the camera head of decentered optical system.For example, following patent documentation 4～6 has been put down in writing and has been used the camera head of using the image pickup optical system of prism, and wherein, this prism uses free form surface etc.
The technical goal of these patent documentations 4～6 records is, uses prism to form image pickup optical system, by use free form surface on light entrance face, light-emitting face or the reflecting surface of this prism, can obtain small-sized and the good image of picture quality.Especially in patent documentation 5 (spy opens the 2002-196243 communique) and patent documentation 6 (spy opens the 2003-84200 communique), put down in writing following technology, make up two prisms, near the light entrance face of the 1st prism of object side, reflecting surface, light-emitting face and near the light entrance face of the 2nd prism of shooting face side, two reflectings surface, light-emitting face totally 7 faces all use free form surface.
As the feature of this optical system, according to following reason, can make integral miniaturization, improve picture quality simultaneously.
(1) reflecting surface with 3 faces uses the free form surface with focal power (refractive index), and these reflectings surface are not subjected to the influence of aberration with respect to dioptric systems such as lens when can obtaining big focal power.
(2) in the space of compactness, can have 7 optical surfaces.Therefore, optics can be set compactly in limited space.
(3) in order to improve optical property, the optical length of preferred optical system integral body has certain length, by using this prism optical system, makes the light path complications, thereby, increased optical length, make whole size realize miniaturization.
In addition, open in the optical system of flat 7-333505 communique record the spy, constitute by catoptron, the formed optical system of lens, catoptron successively from object side, but, compare with this mode, the optical system of patent documentation 5 and patent documentation 6 records can form littler transverse width, therefore, can provide the camera head of more miniaturization.
[patent documentation 1] spy opens the 2001-272587 communique
[patent documentation 2] spy opens the 2002-267928 communique
[patent documentation 3] spy opens the 2002-320122 communique
[patent documentation 4] spy opens flat 11-326766 communique
[patent documentation 5] spy opens the 2002-196243 communique
[patent documentation 6] spy opens the 2003-84200 communique
Consider that above-mentioned camera head is under the situation of the mobile phone that is used for small-sized, slim digital camera or subsidiary camera, the visual angle of image pickup optical system is set at the wide-angle class and becomes the method for pan focus (though set for is fixed-focus, is roughly clear focusing) in whole subject distance range.
In addition,, produced to use and the digital camera of this camera head has been installed or the mobile phone of subsidiary camera reads bar code, perhaps read the demand of literal such as books, original copy as nearest trend.In order to satisfy these demands, need to be fit to the mechanism of macroshot in the camera head of pan focus, still, there is not record in the above-mentioned patent documentation 1～6 about this technology.
In addition, under the situation of producing this camera head in batches, since the deviation in the dimensional discrepancy of each parts of the maintenance frame of optical system and optical system, characteristic deviation, the combination etc., the very difficult shooting face that exactly shot object image is imaged on the imaging apparatus that is used for reading images.
In order to address this problem, in each camera head, must carry out focusing surface adjustment (adjusting) hereinafter referred to as fc, make position and imaging relation of plane the best of the plane of incidence of imaging apparatus, but, about the fc adjusting mechanism not record in above-mentioned patent documentation 1～6 that is fit to this camera head.In addition, it is not open to utilize a spot of parts to realize being fit to these two method and device of the mechanism of above-mentioned macroshot and fc adjusting mechanism yet.
Summary of the invention
Therefore, the objective of the invention is to, a kind of shooting distance according to subject is provided, prism unit can be switched to the 1st position and the 2nd position, the camera head that can also provide a kind of fc of carrying out to adjust is provided, and the image sensing equipment that utilizes this camera head.
One of the present invention is used for from the object incident beam, and obtain the electric signal corresponding with the object picture, it is characterized in that, have: prism unit, it is used for the light beam of incident from object, forms the object picture on imaging surface, has the reflecting surface of two or more free form surface shapes at least, incident is from the incident light axis of the light beam of object and roughly parallel to each other to the ejaculation optical axis of imaging surface outgoing beam from this prism unit, and the interval with regulation; Imaging apparatus, it is configured on the above-mentioned imaging surface, and the formed object of above-mentioned prism unit is looked like to be converted to electric signal; Fixed part, it is used for the location and keeps above-mentioned imaging apparatus; Support component, the direction that it intersects along the sensitive surface with above-mentioned imaging apparatus can support above-mentioned prism unit movably in the movable range of regulation; Housing parts, it covers described prism unit and is fixed on the described fixed part; The 1st abutting part, it is arranged on the part that is installed in the micro-adjusting mechanism between said fixing parts and the prism unit, with a part of butt of above-mentioned prism unit, in the above-mentioned movable range of above-mentioned prism unit, above-mentioned prism unit is positioned at apart from the 1st nearest position of imaging apparatus; The 2nd abutting part, its be arranged on the inboard of described housing parts and with a part of butt of above-mentioned prism unit, in the above-mentioned movable range of above-mentioned prism unit, above-mentioned prism unit is positioned at apart from imaging apparatus the 2nd position farthest; The 3rd abutting part, it is arranged on the above-mentioned prism unit, and with above-mentioned the 1st abutting part butt, above-mentioned prism unit location is remained on above-mentioned the 1st position; The 4th abutting part, it is arranged on the above-mentioned prism unit, and with above-mentioned the 2nd abutting part butt, above-mentioned prism unit location is remained on above-mentioned the 2nd position; Switching mechanism, itself and above-mentioned support component interlock move to above-mentioned prism unit above-mentioned the 1st position or above-mentioned the 2nd position selectively.
The present invention's two camera head, it is characterized in that, in one of the present invention's camera head, above-mentioned the 1st position for example be the corresponding object that will take the position from the position of stipulating to the situation the infinite distance roughly, the standard camera site of taking, above-mentioned the 2nd position for example is the position situation nearer than the position of afore mentioned rules of the corresponding object that will take, the microshot position of taking.
The present invention's three camera head is characterized in that, in one of the present invention's camera head, above-mentioned support component for example is the lever part that is configured in the turning axle pivotal support on the assigned position of said fixing parts; Above-mentioned switching mechanism for example has the switching part that above-mentioned prism unit is switched to above-mentioned the 1st position and above-mentioned the 2nd position by manual operation.
The present invention's four camera head is characterized in that, in the present invention's three camera head, above-mentioned switching part is by the turning axle pivotal support on the assigned position that is configured in the said fixing parts; Above-mentioned switching mechanism has the spring that is connected that connects above-mentioned switching part and above-mentioned lever part; This connection spring is pressed into above-mentioned switching part and above-mentioned lever part above-mentioned prism unit is remained on the above-mentioned the 1st locational the 1st firm position after dismount; With above-mentioned prism unit is remained on the above-mentioned the 2nd locational the 2nd firm position after dismount.
The present invention's five camera head, it is characterized in that, in one of the present invention's camera head, above-mentioned prism unit has two prisms, each prism have at least the above free form surface shape of one side reflecting surface, have the light entrance face of focal power, light-emitting face with focal power, in addition, between two prisms, also have the diaphragm parts.
The present invention's six camera head is characterized in that, in the present invention's five camera head, at least one of above-mentioned the 3rd abutting part and above-mentioned the 4th abutting part is formed on the part of above-mentioned diaphragm parts.
The present invention's seven camera head is characterized in that in one of the present invention's camera head, above-mentioned the 1st abutting part and above-mentioned the 3rd abutting part form the plane respectively, by making each plane unanimity, above-mentioned prism unit is positioned with posture keeps.
The present invention's eight camera head is characterized in that in one of the present invention's camera head, above-mentioned the 2nd abutting part and above-mentioned the 4th abutting part form the plane respectively, by making each plane unanimity, above-mentioned prism unit is positioned with posture keeps.
The present invention's nine camera head is characterized in that, in the present invention's seven camera head, any one plane on the plane that is formed respectively by above-mentioned the 1st abutting part and above-mentioned the 3rd abutting part is made of the front end of the teat that is arranged on 3 places at least.
The present invention's ten camera head is characterized in that, in the present invention's eight camera head, any one plane on the plane that is formed respectively by above-mentioned the 2nd abutting part and above-mentioned the 4th abutting part is made of the front end of the teat that is arranged on 3 places at least.
The present invention's 11 camera head is characterized in that, in one of the present invention's camera head, at least one side of above-mentioned the 3rd abutting part and above-mentioned the 4th abutting part is formed on the part of the prism that constitutes above-mentioned prism unit.
The present invention's 12 camera head is characterized in that, in one of the present invention's camera head, above-mentioned micro-adjusting mechanism and above-mentioned the 3rd abutting part butt, with above-mentioned the 1st position to the direction displacement of the sensitive surface quadrature of above-mentioned imaging apparatus.
The present invention's 13 camera head is characterized in that, in the present invention's 12 camera head, above-mentioned micro-adjusting mechanism has: the inclined-plane that is obliquely installed above-mentioned the 1st abutting part with respect to the sensitive surface of above-mentioned imaging apparatus; Guide, it moves above-mentioned micro-adjusting mechanism along the sensitive surface of above-mentioned imaging apparatus on the vergence direction on above-mentioned inclined-plane; By moving above-mentioned micro-adjusting mechanism, inching is carried out in above-mentioned the 1st position along above-mentioned guide.
The present invention's 14 camera head is characterized in that, in the present invention's 13 camera head, also has the location maintaining part that is used for above-mentioned micro-adjusting mechanism location is remained on assigned position.
The present invention's 15 camera head, it is characterized in that, in the present invention's 13 camera head, above-mentioned micro-adjusting mechanism has at least 3 inclined-planes tilting with equal angular in the same direction, and above-mentioned the 3rd abutting part has at least 3 teats on above-mentioned each inclined-plane of butt.
According to camera head of the present invention, on the direction of prism unit with respect to the sensitive surface quadrature of imaging apparatus, make prism unit be positioned the 1st position by butt the 1st abutting part and the 3rd abutting part, make prism unit be positioned the 2nd position by butt the 2nd abutting part and the 4th abutting part, thus, can switch the position of prism unit selectively.Therefore, can set two focal positions about sensitive surface to the distance of shot body from imaging apparatus.
Description of drawings
Fig. 1 is the stereographic map of digital camera that possesses the camera head of the 1st embodiment of the present invention.
Fig. 2 is the sectional view that schematically shows the inside of digital camera shown in Figure 1.
Fig. 3 is the side view of the prism unit of digital camera shown in Figure 1.
Fig. 4 is the exploded perspective view of prism unit shown in Figure 3.
Fig. 5 is the stereographic map of the 1st prism of prism unit shown in Figure 3.
Fig. 6 is the stereographic map of the 2nd prism of prism unit shown in Figure 3.
Fig. 7 is the stereographic map of the diaphragm parts of prism unit shown in Figure 3.
Fig. 8 is the front view of the diaphragm parts of prism unit shown in Figure 3.
Fig. 9 is the rear view of the diaphragm parts of prism unit shown in Figure 3.
Figure 10 is the stereographic map of prism unit shown in Figure 3.
Figure 11 is the 1st prism of prism unit shown in Figure 3 and the side view of the 2nd prism.
Figure 12 is located at the exploded perspective view of the camera head in the digital camera shown in Figure 1 in being.
Figure 13 is the stereographic map of camera head shown in Figure 12.
Figure 14 is the stereographic map that the back state is removed the housing parts of camera head shown in Figure 13 in expression.
Figure 15 is the vertical view of expression from the partly cut-away of the state of the light incident side observation of camera head shown in Figure 13.
Figure 16 is the side view of expression from the partly cut-away of the state of the 2nd prism side observation of camera head shown in Figure 13.
Figure 17 is the side view of the 1st firm position after dismount of expression camera head shown in Figure 13.
Figure 18 is the side view of the 2nd firm position after dismount of expression camera head shown in Figure 13.
Figure 19 is the sectional view of camera head shown in Figure 17.
Figure 20 is the sectional view of camera head shown in Figure 180.
Figure 21 is the exploded perspective view of the camera head of expression the 2nd embodiment of the present invention.
Figure 22 is the vertical view of expression from the partly cut-away of the state of the light incident side observation of camera head shown in Figure 21.
Figure 23 is the side view of expression from the partly cut-away of the state of the 2nd prism side observation of camera head shown in Figure 21.
Figure 24 is the sectional view along the orientation of the prism of camera head shown in Figure 21.
The sectional view of the camera head of Figure 25 state that to be expression move micro-adjusting mechanism to the 2nd prism side from the state of Figure 24.
The sectional view of the camera head of Figure 26 state that to be expression move micro-adjusting mechanism to the 1st prism side from the state of Figure 24.
Figure 27 is other examples as image sensing equipment of the present invention, and the stereographic map of the mobile phone of subsidiary camera is shown.
Figure 28 is another the routine sectional view that schematically shows prism optical system.
Figure 29 is the sectional view of an example again that schematically shows prism optical system.
Figure 30 is the sectional view of an example again that schematically shows prism optical system.
Embodiment
At first, referring to figs. 1 through Figure 20, being example with the camera describes the image sensing equipment of the present invention's the 1st embodiment.As shown in Figure 1, digital camera 1 has shutter release button 20, flashlamp 21, finder optical system 22, image pickup optical system 23 and picture monitor 24 (with reference to Fig. 2) towards the outer setting of casing 2.As shown in Figure 2, be provided with in the casing 2 camera head 10 of the major part that constitutes image pickup optical system 23, as the image processing circuit 25 of processing unit and as the recording portion 26 of record cell etc.The effect of image processing circuit 25 is the electric treatment of stipulating by the electric signal that camera head 10 is obtained, and obtains view data.Recording portion 26 is used for the recording medium that the Imagery Data Recording from image processing circuit 25 is being suitable for as record cell.
As shown in Figure 3, the 1st prism 41 is the decentered prisms that are made of the plane of incidence 51, the asymmetrical reflecting surface 52 of rotation and exit facet 53.As shown in Figure 5, the exterior lateral area that has at the 53a of effective diameter portion of light path of the exit facet 53 of the 1st prism 41 forms smooth planar portions 53b.Planar portions 53b has and forms columned two location division 53c, 53d and form hemisphere planar three jut 53e, 53f, 53g.Location division 53c, 53d are arranged on the outer fix of the 53a of effective diameter portion.In the present embodiment, as shown in Figure 4 and Figure 5, location division 53c, 53d are configured in along the direction of incident light axis λ i across the face A1 of the crosscut effective diameter 53a of portion and on the position of symmetry.
As shown in Figure 3, the 2nd prism 42 is the decentered prisms that are made of the plane of incidence 61, reflecting surface 62, reflecting surface 63 and exit facet 64.It is asymmetric that in reflecting surface 62 and the reflecting surface 63 at least one forms rotation.As shown in Figure 6, the exterior lateral area that has at the 61a of effective diameter portion of light path of the plane of incidence 61 of the 2nd prism 42 forms smooth planar portions 61b.Planar portions 61b has and forms columned two location division 61c, 61d and form hemisphere planar three jut 61e, 61f, 61g.Location division 61c, 61d are arranged on the outer fix of the 61a of effective diameter portion.Location division 61c, 61d are configured in along emergent light axis λ
ODirection and on the position of symmetry across the face A2 of the crosscut effective diameter 61a of portion.
To shown in Figure 9, diaphragm parts 43 are provided with that effective diameter with the optical effect face of two prisms 41,42 matches and the peristome 62a that constitutes as Fig. 7.And diaphragm parts 43 are also brought into play the function of the holding member of the relative position relation of keeping the 1st prism 41 and the 2nd prism 42.Have in the outside of peristome 62a on two faces of the close peristome 62a of diaphragm parts 43 and form plane planar portions 62b, 62c.
Be formed with location maintaining part 62d, 62e, 62f, 62g on planar portions 62b, the 62c.These location maintaining part 62d～62g forms with location maintaining part 53c, 53d, 61c, 61d matches and through hole that can be chimeric on the position corresponding with the shape of the location maintaining part 53c of the 1st and the 2nd prism 41,42,53d, 61c, 61d.
The example of the thickness H of diaphragm parts 43 is designed to H=1.12mm, and the example of the length t of the location division of the 1st and the 2nd prism 41,42 is designed to t=0.55mm respectively.At this moment, t/H=0.49.
The prism unit 30 of Gou Chenging is entrenched in the maintaining part 62d of location from the planar portions 62b side of the diaphragm parts 43 location division 53c with the 1st prism 41 like this, and location division 53d is entrenched among the maintaining part 62e of location.Thus, determined the position of the 1st prism 41 with respect to diaphragm parts 43.At this moment, be connected on the planar portions 62b of diaphragm parts 43, can determine the degree of tilt of the 1st prism 41 with respect to diaphragm parts 43 by jut 53e, 53f, 53g with the 1st prism 41.
Equally, the location division 61c with the 2nd prism 42 is entrenched in the maintaining part 62f of location from the planar portions 62c side of diaphragm parts 43, and location division 61d is entrenched among the maintaining part 62g of location.Thus, determined the position of the 2nd prism with respect to diaphragm parts 43.At this moment, be connected on the planar portions 62c of diaphragm parts 43, can determine the degree of tilt of the 2nd prism 42 with respect to diaphragm parts 43 by jut 61e, 61f, 61g with the 2nd prism 42.
Like this, as shown in figure 10, the 1st prism 41 and the 2nd prism 42 are maintained at the both sides of diaphragm parts 43.In addition, as shown in figure 11, one side's location maintaining part 62d, 62e and the opposing party's location maintaining part 62f, 62g are arranged on the different positions, make the straight line of the center of gravity by the 1st prism 41 and the center of gravity by the 2nd prism 42 straight line on the diaphragm parts 43 not on same straight line.
In the state of Figure 10, adjust under the situation of the 1st and the 2nd prism 41,42 with respect to the degree of tilt of diaphragm parts 43 at needs, by according to vergence direction and degree of tilt, with jut 61e, 61f, the 61g of jut 53e, 53f, 53g and the 2nd prism 42 of the 1st prism 41 ormal weight of pruning, can adjust the degree of tilt of the 1st prism 41 and the 2nd prism 42 simply.
As described above, the prism unit 30 of present embodiment has at least that the two sides is the reflecting surface 52,62,63 of free form surface shape.And, by being used for incident from the incident light axis λ i of the light beam of object plane be used for from the ejaculation optical axis λ of prism unit 30 to imaging surface 45 outgoing beams
OBe arranged to only separate mutually the interval of regulation and the prism optical system formation of almost parallel.According to such structure, prism unit 30 incidents of present embodiment are from the light beam of object, and form the object picture on imaging surface 45.
Next, in conjunction with Figure 12～Figure 20, to describing with respect to the mechanism that on the sensitive surface of imaging apparatus 12 crisscross, preferably moves the camera head 10 of the above prism unit 30 that illustrates on the orthogonal directions.For simplicity, in each figure, will be made as directions X, the orientation of the 1st prism 41 and the 2nd prism 42 will be made as the Y direction, will be made as the Z direction with the direction of directions X and Y direction quadrature respectively with the direction of the sensitive surface quadrature of imaging apparatus 12.As shown in figure 12, camera head 10 also possesses fixed part 13, housing parts 14, lever part 15, switching part 16 and connects spring 17 except above-mentioned prism unit 30 and imaging apparatus 12.
As shown in figure 13, housing parts 14 covering prism unit 30 are fixed on the fixed part 13.Housing parts 14 is provided with entrance window 14a in the part that the light beam that makes to the 1st prism 41 incidents of prism unit 30 passes through.Cover glass 14b is embedded among the entrance window 14a.As cover glass 14b, can use the IR glass-cutting.Be provided with the 2nd abutting part 14c with a part of butt of prism unit 30 in inboard as housing parts 14 towards prism unit 30 sides.
The diaphragm parts 43 of prism unit 30 are provided with guided plate 31, and this guided plate 31 is configured to and passes through incident light axis λ i and emergent light axis λ
OFace A1, A2 parallel, make it as shown in Figure 14, clip the 1st prism 41 and the 1st prism 42 from both sides.Guided plate 31 also can form as one with diaphragm parts 43, also can be used as miscellaneous part and installs.As shown in figure 15, the inner face sliding contact of guided plate 31 and housing parts 14, with prevent prism unit 30 to crosscut respectively arrange the 1st prism 41 and the 2nd prism 42 the Y direction and with Width (Z direction) skew of the prism unit 30 of the directions X of the sensitive surface quadrature of imaging apparatus 12.
Guided plate 31 has and forms the protruding 31a cylindraceous that is that is extending along the direction of planar portions 62b, the 62c of diaphragm parts 43.The supporting pin 32 that can connect prism unit 30 and lever part 15 rotationally is installed in protruding 31a.Therefore, on housing parts 14, be formed with breach 14d by protruding 31a and supporting pin 32.
At the teat that on four angles of the guided plate 31 of fixed part 13, is formed with to fixed part 13 projectioies.The front end of this teat is by being connected on the 1st abutting part 13b, constitutes prism unit 30 is positioned at apart from the 3rd abutting part 31b on the 1st nearest position P1 of imaging apparatus 12.Like this, the 1st abutting part 13b and the 3rd abutting part 31b form the plane respectively, by making each plane unanimity, prism unit 30 are positioned on the 1st position P1.
In addition, at the teat that on four angles of the guided plate 31 of housing parts 14, is formed with to the 2nd abutting part 14c projection.The front end of this teat is by being connected on the 2nd abutting part 14c, and formation is positioned at prism unit 30 apart from the 4th abutting part 31c on imaging apparatus 12 the 2nd position P2 farthest.Like this, the 2nd abutting part 14c and the 4th abutting part 31c form the plane respectively, by making each plane unanimity, prism unit 30 are positioned on the 2nd position P2.
In addition, in the present embodiment, as the plane that the front end by teat constitutes, example shows the 3rd abutting part 31b and the 4th abutting part 31c, but also can be arranged to respectively and the 1st abutting part 13b and the consistent shape of the 2nd abutting part 14c.In addition, also following teat can be set: the 3rd abutting part 31b and the 4th abutting part 31c are formed in the plane, on consistent with the 3rd abutting part 31b and the 4th abutting part 31c respectively plane of the 1st abutting part 13b and the 2nd abutting part 14c, dispose leading section.
The cardinal extremity 16a of switching part 16 is by the turning axle R1 pivotal support coaxial with the base end part 15a of lever part 15.On radial direction, couple together by being connected spring 17 away from the front end 15b of the lever part 15 of turning axle R1 and the front end 16b of switching part 16.The front end 16b of switching part 16 is set on the position than the more close turning axle R1 of front end 15b of lever part 15.Thus, the front end 16b that can make the front end 15b of lever part 15 and switching part 16 be connected spring 17 and support this spring(-supported) mount 18a, 18b that is connected spring 17 by each front end 15b, 16b freely to rotate crisscross motion does not intrusively take place mutually.
Like this, switching part 16 be connected spring 17 by with lever part 15 interlocks as support component, obtain the 1st firm position after dismount S1 and the 2nd firm position after dismount S2, bring into play the function that makes prism unit 30 move, also locate to the 1st position P1 or the 2nd position P2 selectively as switching mechanism.
In addition, utilize to connect spring 17, can prism unit 30 be pressed on the fixed part 13, be pressed on the housing parts 14 at the 2nd position P2 at the 1st position P1, therefore, prism unit 30 can not maintained with not rocking reliably on the 1st position P1 and the 2nd position P2.
Because the 3rd abutting part and the 4th abutting part are made of the front end of teat, so, by adjusting the height of teat front end, can proofread and correct the positioning error of the prism unit 30 in the manufacturing tolerance that is produced when producing camera head 10 in batches at an easy rate.
In addition, as shown in Figure 2, in the present embodiment, the 1st position P1 for example is the standard camera site, and the 2nd position P2 for example is the microshot position.Switching part 16 and manual operation switching part 95 interlocks that shell 2 from digital camera shown in Figure 11 exposes by operation manual operation switching part 95, can switch to the 1st firm position after dismount S1 and the 2nd firm position after dismount S2.Therefore,, can selectively prism unit 30 be switched to the 1st position P1 and the 2nd position P2, can set two focal positions by operation manual operation switching part 95.In addition, also can manually operate switching part 16, and actuators such as use motor carry out electronic switching.
In the present embodiment, the 3rd abutting part 31b and the 4th abutting part 31c whichsoever are formed on the guided plate 31 that is arranged on diaphragm parts 43, but also can be arranged on the diaphragm parts 43, perhaps can be arranged on the part of the 1st prism 41 and the 2nd prism 42, perhaps can be provided with across the 1st prism the 41, the 2nd prism 42 and diaphragm parts 43 respectively.In addition, replace being provided with housing parts 14, the support that possesses the 2nd abutting part can be extended out and is provided with from fixed part 13, wherein, the 4th abutting part 31c butt of the prism unit 30 on the 2nd abutting part and the 2nd position P2.
Then, with reference to Figure 21～Figure 26, the camera head 10a of the present invention's the 2nd embodiment is described.The camera head 10a of present embodiment is with respect to the camera head 10 of the 1st embodiment, also have on the point of micro-adjusting mechanism 70 different.Therefore, since identical with the irrelevant structure of micro-adjusting mechanism 70 with the 1st embodiment, thus give identical symbol to textural element with identical function, and omit its explanation.
As shown in figure 21, micro-adjusting mechanism 70 is installed between fixed part 13 and the prism unit 30.As Figure 24～shown in Figure 26, micro-adjusting mechanism 70 is configured to and can moves on the Y direction of arranging the 1st prism 41 and the 2nd prism 42.Be formed with the guide portion 13e that extends to the 1st prism 41 sides along the Y direction on the fixed part 13.The leading section 71 of the micro-adjusting mechanism 70 of the 1st prism 41 sides passes through between guide portion 13e and substrate 11.In addition, as Figure 22～shown in Figure 26, the base end part 72 of the micro-adjusting mechanism 70 of the 2nd prism 42 sides exposes from the outside of housing parts 14.
As Figure 24～shown in Figure 26, the camera head 10a that possesses the micro-adjusting mechanism 70 that constitutes as above is arranged on the 3rd abutting part 31b and the 1st abutting part 73b butt that is arranged on the micro-adjusting mechanism 70 on the prism unit 30 under the state of the 1st firm position after dismount S1 that prism unit 30 is positioned the 1st position P1.Under this state, if adjusting mechanism is moved to the state of Figure 25 from the state of Figure 24, perhaps move to the state of Figure 26, then be equivalent to the amount (distance) of the gradient of inclined-plane 73a along a directions X displacement with the sensitive surface quadrature of imaging apparatus 12 from the state of Figure 24.
In the present embodiment, because inclined-plane 73a is oblique to 41 inclinations of the 1st prism, so, moving to the state of Figure 25 by state from Figure 24, prism unit 30 is to the direction displacement near imaging apparatus 12.In addition, by micro-adjusting mechanism 70 is moved to the state of Figure 26 from the state of Figure 24, prism unit 30 is to the direction displacement away from imaging apparatus 12.
Like this, the camera head 10a that possesses micro-adjusting mechanism 70 can carry out the position adjustment of prism unit 30, i.e. the inching of focus face (fc adjustment) on the 1st position P1 of the 1st abutting part 73b butt of the 3rd abutting part 31b of prism unit 30 and micro-adjusting mechanism 70.In addition, carry out utilizing bonding agent or lf after the fc adjustment, micro-adjusting mechanism 70 is fixed between leading section 71 and guide portion 13e, base end part 72 and fixed part 13 or the housing parts 14.
In addition, in the 1st and the 2nd embodiment, the 3rd abutting part 31b and the 4th abutting part 31c are provided with 4 places respectively, but as long as 3 places are set at least, just can set the posture of prism unit 30 for desired angle with respect to the sensitive surface of imaging apparatus.Therefore, in the 2nd embodiment, the inclined-plane 73a of the micro-adjusting mechanism 70 corresponding with the 3rd abutting part 31b needs only 3 places is set at least too.
As an example of image sensing equipment of the present invention, Figure 27 shows camera head is installed in example in the mobile phone 160 of subsidiary camera.Be installed in the mobile phone 160 of this subsidiary camera by the camera head that the respective embodiments described above are illustrated (for example camera head 10), can realize miniaturization, slimming and high-qualityization of image of the mobile phone 160 of subsidiary camera.
Figure 28～Figure 30 represents to be applicable to prism unit 30a, the 30b of camera head of the present invention, the mutually different example of 30c respectively.No matter whichever will do among prism unit 30a, 30b, the 30c switches the 1st position P1 and the 2nd position P2 by the switching mechanism identical with the camera head of above-mentioned embodiment.
The 1st prism 41a of prism unit 30a shown in Figure 28 and each face 201～206 of the 2nd prism 42a all are made of free form surface.Reflect by the 1st 201 from the light of the 1st 201 incidents,, follow, after reflecting by the 3rd 203, by the 4th 204 refraction by the 2nd 202 total reflections.Then by after the 5th 205 total reflections, by the 6th 206 total reflections, by the 5th 205 refraction back imaging on imaging surface 45.
The decentered prism 210 of prism unit 30b shown in Figure 29 has the 1st 211, the 2nd 212, the 3rd 213 that are made up of free form surface.Light by 214 incidents of diaphragm parts reflects by the 1st 211, and incide on the decentered prism 210, carry out internal reflection by the 2nd 212, incide again on the 1st 211, carry out total reflection specifically, and carry out internal reflection by the 3rd 213, carry out total reflection by the 1st 211 for the third time, carry out internal reflection by the 3rd 213 again, the 4th time by the 1st 211 refraction, and imaging on imaging surface 45.
The 1st prism 221 of prism unit 30c shown in Figure 30 and each face 231～238 of the 2nd prism 222 all are made of free form surface.Reflect by the 1st 231 from the light of the 1st 231 incidents, and by the 2nd 232 total reflections, and after the 3rd 233 total reflections, by the 4th 234 and the 5th 235 refractions, then, after the 6th 236 and the 7th 237 total reflections, by the 8th 238 refraction, and imaging on imaging surface 45.
In addition, when enforcement was of the present invention, the textural element of prism optical system, guide, imaging apparatus, switching mechanism etc. and invention was certainly implemented by various changes in the scope that does not break away from design of the present invention.
In addition, in the above-described embodiment, though utilize manual operation switching part 95 that the switching part 16 of switching mechanism is switched to the 1st firm position after dismount S1 and the 2nd firm position after dismount S2, but replace using manual operation switching part 95, can carry out electronic switching by using actuators such as motor or o.
Claims (15)
1, a kind of camera head is used for from the object incident beam, and obtains the electric signal corresponding with the object picture, it is characterized in that having:
Prism unit, it is used for the light beam of incident from object, on imaging surface, form the object picture, has the reflecting surface of two or more free form surface shapes at least, incident is from the incident light axis of the light beam of object and roughly parallel to each other to the ejaculation optical axis of imaging surface outgoing beam from this prism unit, and the interval with regulation;
Imaging apparatus, it is configured on the above-mentioned imaging surface, and the formed object of above-mentioned prism unit is looked like to be converted to electric signal;
Fixed part, it is used for the location and keeps above-mentioned imaging apparatus;
Support component, the direction that it intersects along the sensitive surface with above-mentioned imaging apparatus can support above-mentioned prism unit movably in the movable range of regulation;
Housing parts, it covers described prism unit and is fixed on the described fixed part;
The 1st abutting part, it is arranged on the part that is installed in the micro-adjusting mechanism between said fixing parts and the prism unit, with a part of butt of above-mentioned prism unit, in the above-mentioned movable range of above-mentioned prism unit, above-mentioned prism unit is positioned at apart from the 1st nearest position of imaging apparatus;
The 2nd abutting part, its be arranged on the inboard of described housing parts and with a part of butt of above-mentioned prism unit, in the above-mentioned movable range of above-mentioned prism unit, above-mentioned prism unit is positioned at apart from imaging apparatus the 2nd position farthest;
The 3rd abutting part, it is arranged on the above-mentioned prism unit, and with above-mentioned the 1st abutting part butt, above-mentioned prism unit location is remained on above-mentioned the 1st position;
The 4th abutting part, it is arranged on the above-mentioned prism unit, and with above-mentioned the 2nd abutting part butt, above-mentioned prism unit location is remained on above-mentioned the 2nd position;
Switching mechanism, itself and above-mentioned support component interlock move to above-mentioned prism unit above-mentioned the 1st position or above-mentioned the 2nd position selectively.
2, camera head according to claim 1 is characterized in that,
Above-mentioned the 1st position be the corresponding object that will take the position from the position of stipulating to the situation the infinite distance roughly, the standard camera site of taking, above-mentioned the 2nd position is the position situation nearer than the position of afore mentioned rules of the corresponding object that will take, the microshot position of taking.
3, camera head according to claim 1 is characterized in that,
Above-mentioned support component is the lever part by the turning axle pivotal support on the assigned position that is configured in the said fixing parts;
Above-mentioned switching mechanism has the switching part that above-mentioned prism unit is switched to above-mentioned the 1st position and above-mentioned the 2nd position by manual operation.
4, camera head according to claim 3 is characterized in that,
Above-mentioned switching part is by the turning axle pivotal support on the assigned position that is configured in the said fixing parts;
Above-mentioned switching mechanism has the spring that is connected that connects above-mentioned switching part and above-mentioned lever part;
Above-mentioned connection spring is pressed into above-mentioned switching part and above-mentioned lever part above-mentioned prism unit is remained on the above-mentioned the 1st locational the 1st firm position after dismount; With above-mentioned prism unit is remained on the above-mentioned the 2nd locational the 2nd firm position after dismount.
5, camera head according to claim 1 is characterized in that,
Above-mentioned prism unit has two prisms, each prism have at least the free form surface shape of one side reflecting surface, have the light entrance face of focal power, light-emitting face with focal power, in addition, between two prisms, also have the diaphragm parts.
6, camera head according to claim 5 is characterized in that,
At least one of above-mentioned the 3rd abutting part and above-mentioned the 4th abutting part is formed on the part of above-mentioned diaphragm parts.
7, camera head according to claim 1 is characterized in that,
Above-mentioned the 1st abutting part and above-mentioned the 3rd abutting part form the plane respectively, by making each plane unanimity, above-mentioned prism unit is positioned with posture keep.
8, camera head according to claim 1 is characterized in that,
Above-mentioned the 2nd abutting part and above-mentioned the 4th abutting part form the plane respectively, by making each plane unanimity, above-mentioned prism unit is positioned with posture keep.
9, camera head according to claim 7 is characterized in that,
Any one plane on the plane that above-mentioned the 1st abutting part and above-mentioned the 3rd abutting part form respectively is made of the front end of the teat that is arranged on 3 places at least.
10, camera head according to claim 8 is characterized in that,
Any one plane on the plane that above-mentioned the 2nd abutting part and above-mentioned the 4th abutting part form respectively is made of the front end of the teat that is arranged on 3 places at least.
11, camera head according to claim 1 is characterized in that,
At least one side of above-mentioned the 3rd abutting part and above-mentioned the 4th abutting part is formed on the part of the prism that constitutes above-mentioned prism unit.
12, camera head according to claim 1 is characterized in that,
Above-mentioned micro-adjusting mechanism and above-mentioned the 3rd abutting part butt, with above-mentioned the 1st position to the direction displacement of the sensitive surface quadrature of above-mentioned imaging apparatus.
13, camera head according to claim 12 is characterized in that,
Above-mentioned micro-adjusting mechanism has:
Be obliquely installed the inclined-plane of above-mentioned the 1st abutting part with respect to the sensitive surface of above-mentioned imaging apparatus;
Guide, it moves above-mentioned micro-adjusting mechanism along the sensitive surface of above-mentioned imaging apparatus on the vergence direction on above-mentioned inclined-plane;
By moving above-mentioned micro-adjusting mechanism, inching is carried out in above-mentioned the 1st position along above-mentioned guide.
14, camera head according to claim 13 is characterized in that,
Also has the location maintaining part that is used for above-mentioned micro-adjusting mechanism location is remained on assigned position.
15, camera head according to claim 13 is characterized in that,
Above-mentioned micro-adjusting mechanism has in the same direction 3 inclined-planes tilting with equal angular at least, and above-mentioned the 3rd abutting part has 3 teats on above-mentioned each inclined-plane of butt at least.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003373595 | 2003-10-31 | ||
| JP2003373595A JP2005134832A (en) | 2003-10-31 | 2003-10-31 | Imaging unit and equipment for image pickup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1612031A CN1612031A (en) | 2005-05-04 |
| CN100454134C true CN100454134C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100858979A Expired - Fee Related CN100454134C (en) | 2003-10-31 | 2004-10-29 | Image sensing device and equipment thereof |
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| Country | Link |
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| JP (1) | JP2005134832A (en) |
| CN (1) | CN100454134C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116211A (en) * | 2013-01-25 | 2013-05-22 | 北京航空航天大学 | Method for clamping curved prism |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4102394B2 (en) * | 2005-08-19 | 2008-06-18 | 株式会社東芝 | Camera device |
| US7791822B2 (en) | 2006-08-21 | 2010-09-07 | Konica Minolta Opto, Inc. | Focusing method and image-taking apparatus |
| US7567287B2 (en) * | 2006-09-20 | 2009-07-28 | Sony Ericsson Mobile Communications Ab | Rotating prism for a digital camera in a portable mobile communication device |
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|---|---|---|---|---|
| JPH08237426A (en) * | 1995-02-27 | 1996-09-13 | Nikon Corp | Image reader and its focusing method |
| US5847887A (en) * | 1995-02-28 | 1998-12-08 | Ohtsuka Patent Office | Optical apparatus |
| JPH11326766A (en) * | 1998-05-19 | 1999-11-26 | Olympus Optical Co Ltd | Image-formation optical system and device using the system |
| JPH11337811A (en) * | 1998-05-22 | 1999-12-10 | Olympus Optical Co Ltd | Optical prism, mirror frame, and optical assembly |
| US6243208B1 (en) * | 1996-08-22 | 2001-06-05 | Canon Kabushiki Kaisha | Optical element, optical system using optical element, and optical device with optical element |
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2003
- 2003-10-31 JP JP2003373595A patent/JP2005134832A/en not_active Withdrawn
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08237426A (en) * | 1995-02-27 | 1996-09-13 | Nikon Corp | Image reader and its focusing method |
| US5847887A (en) * | 1995-02-28 | 1998-12-08 | Ohtsuka Patent Office | Optical apparatus |
| US6243208B1 (en) * | 1996-08-22 | 2001-06-05 | Canon Kabushiki Kaisha | Optical element, optical system using optical element, and optical device with optical element |
| JPH11326766A (en) * | 1998-05-19 | 1999-11-26 | Olympus Optical Co Ltd | Image-formation optical system and device using the system |
| JPH11337811A (en) * | 1998-05-22 | 1999-12-10 | Olympus Optical Co Ltd | Optical prism, mirror frame, and optical assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116211A (en) * | 2013-01-25 | 2013-05-22 | 北京航空航天大学 | Method for clamping curved prism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1612031A (en) | 2005-05-04 |
| JP2005134832A (en) | 2005-05-26 |
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