CN1231808C - Camera - Google Patents

Abstract

The invention provides a camera in which an excellent subject image is formed by cutting off unnecessary light beams and which is made thin and small-size das a camera which has a bent optical system including a reflecting means. This camera is equipped with a 1st lens group 14a that luminous flux enters, a reflecting means 33 which reflects the light passing through the 1st lens group at right angles to the optical axis, an image pickup element 23a which is integrated with a frame member where a subject image is formed with the luminous flux reflected by the reflecting means, a focus adjusting mechanism 45 which performs focus adjusting operation for the subject image by varying the distance between the reflecting means and image pickup element, and a subject luminous flux incidence window 11a which is formed in an exterior member and has an opening large enough to transmit the subject luminous flux made incident on the 1st lens group and also has its long-side size so set that the subject luminous flux made incident on the 1st lens group is transmitted in either of cases wherein the distance between the reflecting means displaced according to the focus adjusting operation and the image pickup element is set to be shortest or longest.

Description

Camera

Technical field

The present invention relates to camera, relate to have a kind of like this camera of photographic optical system in more detail, this photographic optical system has a kind of reflection unit that light beam from subject is reflected.

Background technology

Past, light beam (hereinafter to be referred as the subject light beam) from subject is injected in the photographic optical system that is made of many lens, the subject image of Xing Chenging just is imaged on the subject image capturing device on the assigned position like this, for example, on the sensitive surface of the film of the charge-coupled image sensor picture pick-up devices such as (CCD:ChargeCoupled Device) or the usefulness of taking pictures etc., also can it be recorded on the recording medium form in accordance with regulations so obtain required subject image.The camera of Gou Chenging like this, promptly so-called digital general camera or Digital Video or photo video camera and kinematograph etc., generally practicability and extensively popularizing.

The camera in this past, in order to make the imaging on assigned position of subject image, it constitutes the general photographic optical system that is made of a plurality of lens etc. that adopts.

The magazine photographic optical system in past, the general form that adopts is: for example for the subject light beam that is injected into camera inside by a plurality of lens is directed to picture pick-up device or the sensitive surface of the subject image capturing device of the regulation of the film of the usefulness of taking pictures etc. on, the reflection unit of regulations such as catoptron is arranged in this light path, make the light path of subject light beam bend to the direction of regulation, for example with incident light axis substantially on the rectangular direction.And, wherein, adopt the camera that photographic optical system constituted of above-mentioned so-called bending optical system, for example open flat 9-281578 communique, the spy opens in flat 9-163206 communique etc. and proposed multiple scheme the spy.

Open flat 9-281578 communique and above-mentioned spy drives disclosed cameras such as flat 9-163206 communique by above-mentioned spy, in the light path of the photographic optical system that the subject light beam is seen through, be provided with and a kind ofly can bend to reflection unit on the vertical direction to the optical axis of subject light beam substantially, so both guaranteed necessary optical path length, and made camera itself realize miniaturization again.

Like this, adopt the so-called bending optical system that reflection unit etc. is set in the light path of this photographic optical system at camera, realize that for camera itself miniaturization is very useful.

But, adopt the photographic optical system of above-mentioned bending optical system, its formation is: the subject light beam of incident is on the internal face of the supporting member of supporting structure lens etc., and the inner face reflection ray that produces owing to reflection, the oblique light ray in the direction of extreme inclination is injected into the lens of the most close subject and the useless light such as light that do not reflect to prescribed direction by the light of reflection unit reflection arrive on the image space of regulation easily.

So these useless light make the image of obtaining produce clutters such as ghost image and flicker, thereby make image quality decrease.Therefore, in the photographic optical system of camera, be equipped with so-called bending optical system, need can cause the useless light of image quality decrease to take to block or prevent measure to those, (preventing useless light).

But, open all undeclared above-mentioned unwanted light measure that prevents in flat 9-281578 communique and the flat 9-163206 communique of Te Kai above-mentioned spy.So, can think that the past does not take into full account the problem that prevents unwanted light in having the photographic optical system of bending optical system.

That is to say, for example, the general photographic optical system of the camera in past, on constituting, there is not reflection unit, the light path of subject light beam does not have bending in the inside of photographic optical system, be used to block and prevent the aperture member of useless light, only be arranged on one or several necessary position and get final product.Therefore, the bending optical system in past also can be counted as and only take a kind of like this measure that prevents useless light, and the general photographic optical system that this measure constitutes with not crooked light path is identical.

But, in general photographic optical system,, generally focal adjustments mechanism etc. must be arranged for the focus of regulating the subject image makes its imaging on assigned position.The regulation lens that this focal adjustments mechanism is used for making a plurality of lens that constitute photographic optical system are adjusted the image space of subject image moving with this on the direction of optical axis.

In this photographic optical system with bending optical system, realize that camera fore-and-aft direction compact in size is that the effective means of slimming is: from a plurality of lens that constitute photographic optical system to the light path of subject light beam carry out before crooked part, promptly begin to set very shortly to the length dimension that reflection unit ends from the front side lens combination that is arranged near subject.

But, in having the photographic optical system of above-mentioned bending optical system,, carry out the focal adjustments action if being formed on the optical axis direction of front side lens combination that is arranged in before the bending of object light beam optical path moved, so, this lens formation sheet number and lens combination number just increase.So the problem of existence is to be difficult to make camera to realize miniaturization with this device.

So in order to reduce the setting size (attenuate) of camera fore-and-aft direction, the lens of front side lens combination constitute, and preferably just can bring into play necessary light gathering with necessary minimal lens number.

Consider this situation, in having the photographic optical system of bending optical system, relative displacement to the formation lens of front side lens combination is fixed, simultaneously, to carrying out displacement, carry out the focal adjustments action with this as the interval between the regulation members such as film of the picture pick-up device of reflection unit and subject image capturing device and the usefulness of taking a picture.

But, utilize the camera of picture pick-up device as the subject image capturing device, this picture pick-up device affix is comprised the circuit board of a plurality of electrical structure parts and wiring etc. etc., generally these parts form an integral body.

So, for focal adjustments action, the photographic optical system side is fixed, the picture pick-up device side is moved, in the case, it is mobile that the accessory etc. that is attached to picture pick-up device also must carry out machinery with moving of this picture pick-up device.

And, the film that employing is taken a picture is as the camera of subject image capturing device, be the focal adjustments action, the photographic optical system side is fixed, the film side of taking a picture is moved, in the case, it is mobile to make a plurality of constituent parts of using for the planarity of the film of the usefulness of guaranteeing to take a picture etc. carry out machinery with taking a picture with moving of film.

If consider these factors, then following measures can not best at last measure, promptly changes the position of subject image capturing device sides such as film on the optical axis of photographic optical system of the picture pick-up device or the usefulness of taking a picture, and carries out the focal adjustments action, and this is not a very wise move.

And, open flat 9-281578 communique and above-mentioned spy above-mentioned spy and open in the flat 9-163206 communique etc., carrying out the also not explanation of the used mechanism of focal adjustments action in the photographic optical system with bending optical system.

Summary of the invention

The present invention be directed to above-mentioned situation proposes, its purpose is to provide a kind of like this camera, promptly photographic optical system wherein has reflection unit is arranged in bending optical system in the light path of optical system, in this camera, interdicted forming the otiose useless light of subject image because the object light of incident is intrafascicular, be in very that kilter subject image down carries out imaging on the imaging surface of stipulating so can make.

And, a kind of like this camera is provided, promptly adopt on the one hand to have the photographic optical system of bending optical system, can realize the slimming of camera fore-and-aft direction on the one hand, help the photographic optical system of camera integral miniaturization.

In order to achieve the above object, the camera of the 1st invention is characterized in that having:

The 1st group of lens, it is made of a plurality of lens, wherein injects the light beam from subject;

Reflection unit is used to make the transmitted light of injecting by above-mentioned the 1st group of lens from object side reflecting with the perpendicular direction of the optical axis of the 1st group of lens substantially;

The subject image capturing device, it is disposed in by above-mentioned reflection unit is undertaken on the position of the subject image imaging that beam reflected forms, and constitutes an integral body with frame parts;

Focal adjustments mechanism is used for being undertaken by the interval that changes above-mentioned reflection unit and subject image capturing device the focal adjustments action of subject image; And

Subject light beam entrance window, it is formed on the casing part, its opening size can make the subject light beam that is injected in above-mentioned the 1st group of lens pass through, simultaneously, the size of its long side direction is configured to such state, when still being set to longest distance when promptly above-mentioned reflection unit that no matter moves with the focal adjustments action and the distance between the subject image capturing device are set to bee-line, all can make to be injected into the interior subject light beam of above-mentioned the 1st group of lens and to pass through.

So, adopt the camera of the 1st invention, in the light beam from subject is injected into the 1st group of lens that are made of a plurality of lens after, by reflection unit make by the 1st group of lens transmitted light with the vertical substantially direction of the optical axis of the 1st group of lens on reflect.Carry out beam reflected by this reflection unit and form the subject image, a kind of subject image capturing device is set on its image space and makes it and FRAME COMPONENTS forms integrated.Focal adjustments mechanism carries out the focal adjustments action of subject image by the interval that changes above-mentioned reflection unit and subject image capturing device.Subject light beam entrance window, it is formed on the casing part, its opening chi is in the subject light beam that is injected in above-mentioned the 1st group of lens is passed through, simultaneously, the size of its long side direction is configured to such state, when still being set to longest distance when promptly above-mentioned reflection unit that no matter moves with the focal adjustments action and the distance between the subject image capturing device are set to bee-line, all can make to be injected into the interior subject light beam of above-mentioned the 1st group of lens and to pass through.

The camera of the 2nd invention, it is characterized in that: in the camera of above-mentioned the 1st invention, the formation state of above-mentioned subject light beam entrance window is: on the perpendicular direction of the direction cardinal principle that moves with focal adjustments action with above-mentioned the 1st group of lens, its opening size equals the diameter dimension of the incident beam of subject substantially.

The camera of the 3rd invention is characterized in that, in the camera of above-mentioned the 1st invention or the 2nd invention, subject light beam entrance window is elongated shape, the direction that the direction on its long limit moves with the focal adjustments action along above-mentioned the 1st group of lens.

Description of drawings

Fig. 1 is the oblique view of the camera of one embodiment of the present of invention.

Fig. 2 is a partial arrangement drawing, the layout of the primary structure part of its expression when a positive side watches the camera of Fig. 1 inner.

Fig. 3 is a partial arrangement drawing, the layout of the primary structure part of its expression when a top side watches the camera of Fig. 1 inner.

Fig. 4 is the sectional drawing along the Z-Z line of Fig. 2, the magazine imaging lens unit inner structure overview of its presentation graphs 1.

Fig. 5 is a planimetric map, and the catoptron in the magazine photographic optical system constitutional detail of Fig. 1 is only taken out in its expression, expresses reflecting surface one side of this catoptron.

Fig. 6 is a planimetric map, 1st shape that prevent reflecting member of its expression when arrow B direction shown in Figure 4 is watched.

Fig. 7 is a planimetric map, 3rd shape that prevent reflecting member of its expression when arrow B direction shown in Figure 4 is watched.

Embodiment

Below with reference to the accompanying drawings, describe embodiments of the invention in detail.

The camera of 1 embodiment of the present invention is the digital general camera of a kind of what is called, promptly the light beam (hereinafter to be referred as the subject light beam) from subject is injected in the photographic optical system that is made of multiple lens etc., form the subject image, this image imaging is on the sensitive surface of charge coupled cell picture pick-up devices such as (CCD), this CCD etc. is disposed on the position of regulation as the subject image capturing device, obtain required subject image by such imaging, and can be with it as the view data of regulation form and be recorded on the recording medium of regulation.And, in this camera, having a kind of display device of regulation, the view data of the regulation form of its energy reading and recording on recording medium shows it as image.And, camera only is described in the following description.

Fig. 1 represents the oblique view of the camera of one embodiment of the present of invention.And Fig. 2, Fig. 3 represent the layout of main composition part of the camera inside of one embodiment of the present of invention, and wherein, Fig. 2 represents that the member when the front is watched arranges; Fig. 3 represents that the member when upper face side is watched arranges.

At first, according to Fig. 1 ~ Fig. 3 the general formation of this camera is described as follows.

As shown in Figure 1, the casing of the camera 1 of present embodiment is made of following part:

Protecgulum 11 is used for the front face side of covering protection inner structure part (not shown at Fig. 1, referring to following Fig. 2, Fig. 3);

Bonnet 12 is used for the back side of covering protection inner structure part; And

Block parts 13 etc., it is provided with state is to slide freely along arrow directions X shown in Figure 1 with respect to protecgulum 11.

Blocking parts 13 is configured to can slide freely within the specific limits with respect to the protecgulum 11 of camera 1, it can move freely between following 2 positions: one is off-position, and expression covers near the front face side of various structural members set the cardinal principle central part of front of protecgulum 11; Another is the position of taking pictures, and expression exposes the front face side (state shown in Figure 1) of said structure spare.And, block the inside that parts 13 are arranged in camera 1, with main power switch 28 (referring to Fig. 2, Fig. 3) interlock mutually, be used to switch on and off the primary power of this camera 1.That is to say, block parts 13 and carry out switch motion, drive coupled moving main power switch 28 and carry out switch motion by making.

Be provided with near the central part substantially in protecgulum 11 fronts: it is (not shown in Fig. 1 to constitute imaging lens unit 14, referring to following Fig. 2, Fig. 3) the 1st lens 14aa, the object lens 15a of viewing optical system of a part that constitutes view finder unit 15 (not shown in Fig. 1) of photographic optical system of a part referring to following Fig. 2, Fig. 3 and the light-emission window 16 etc. that constitutes the part of flash light emission device.

And, on the protecgulum 11 in crust component, on the assigned position of the lens 14aa that imaging lens unit 14 is faced, form a kind of lens openings 11a of portion as subject light beam entrance window, its opening size can make the subject light beam of injecting the 1st group of lens 14a by (referring to Fig. 4).Being shaped as of the 11a of this lens openings portion is elongated, is rectangle substantially, and its long limit is positioned on the arrow directions X shown in Figure 1.

Moreover the front of these structural members (the 1st lens 14aa, object lens 15a, light-emission window 16 etc.) is positioned at shown in Figure 1 taking pictures during the position when blocking parts 13, as becoming the outside state that is exposed to shown in the figure; On the other hand, when blocking parts 13 and move to off-position, its front is blocked parts 13 by this and is covered, and therefore is protected, and avoids external action.

On the other hand, on camera 1, be furnished with shutter button release 17 near on the assigned position of an end.The shutter release switch of this shutter button release 17 and camera 1 inside (not having diagram) is interlock mutually.

On the other hand, be furnished with various operation parts (not having diagram) and display device 27 (referring to Fig. 3) at the back side of camera 1.

Following according to Fig. 2, Fig. 3, describe the layout of the primary structure part of this camera 1 inside in detail.

In this camera 1, main inner structure part has: the imaging lens unit 14 that is made of photographic optical system, the view finder unit 15 that is made of viewing optical system and polylith circuit board etc.

Wherein, imaging lens unit 14 is disposed in the casing of this camera 1 near on the assigned position of an end, be positioned near the right part assigned position from the face side of camera 1 on.On the assigned position of these imaging lens unit 14 upsides, be furnished with view finder unit 15 and make itself and this imaging lens unit 14 form integrated.

In camera 1, polylith circuit board in internal placement is: be positioned near the main circuit board 22 on the assigned position of camera 1 front, on assigned position, the imaging circuit plate 23 of subject image capturing device such as picture pick-up device 23a is installed on it along a side arrangement of camera 1, be connected the connection circuit board 24 between this imaging circuit plate 23 and the main circuit board 22, the sort of external interface circuit plate 25 that is used to connect the various connection terminal 25a of this camera 1 and external unit is installed, and with the corresponding assigned position of cardinal principle core at the back side of main circuit board 22 on set flash generator circuit board 26 etc.

Main circuit board 22 is disposed in as mentioned above near on the assigned position of camera 1 front, and it has the notch part 22d that the part of regulation is cut away.The purpose that is provided with of this notch part 22d is to guarantee certain space, so that arrange imaging lens unit 14 and view finder unit 15 etc.

And, near the end of the side that notch part 22d position opposite is set, go up at the circuit board face (front of camera 1) of main circuit board 22 Storage Card Drivers device 22b be installed.This Storage Card Drivers device 22b is a kind of recording medium, is used to preserve the view data that is obtained by this camera 1, and for example a kind of cassette storer of chip shape etc. (not having diagram) can load and unload freely on camera 1.And, the cassette storer of this Storage Card Drivers device 22b to installing thereon, it can write down the signal Processing of regulation was obtained and carried out to (writing) by this camera 1 the view data of regulation form; Perhaps read view data that is write down on this cassette storer etc. etc.

Moreover, be on the face of camera 1 front face side at the real estate of main circuit board 22, be furnished with above-mentioned main power switch 28.This main power switch 28 and blocks parts 13 interlock mutually as mentioned above, moves on the arrow directions X of Fig. 1, carries out switch motion (on-off action).

Imaging circuit plate 23 is disposed in as mentioned above along on the assigned position of a side of camera 1, and electric parts such as picture pick-up device 23a are installed on this circuit board.And this imaging circuit plate 23 forms integrated by picture pick-up device 23a with imaging lens unit 14.

And the connection between imaging circuit plate 23 and the main circuit board 22 is carried out with circuit board 24 by connecting.That is to say, imaging circuit plate 23 connects with being connected with the flat cable 23b of circuit board 24 by regulation, on the other hand, connector 22a, the 24a that is connected usefulness is set connecting respectively, connects imaging circuit plate 23 and main circuit board 22 with being connected with circuit board 24 by this connector 22a, 24a with on circuit board 24 and the main circuit board 22.

On the other hand, external interface circuit plate 25 is little circuit boards, and electric parts such as splicing ear 25a are installed on it, is used for connecting this camera 1 and external unit by stube cable.And the external unit here has: for example with USB (Uniuversal Serial Bus: USB (universal serial bus)) the corresponding external record device of interface and with can receiving video signals the corresponding exterior display device of video signal interface of output or external record device etc.In addition, can receive the power interface etc. of the power supply of supplying with from external power source device etc. in addition.

And this external interface circuit plate 25 is not connected with main circuit board 22 by (the having diagram) such as cable components such as lead-in wire of the regulation of energy transmission of electric signals.

On the other hand, the power circuit that is used to control following electric power is installed on flash generator circuit board 26, and this electric power is given altogether and is used splicing ear from being contained in the power-supply battery 18a in the battery installation room 18 or being installed in external power source among the splicing ear 25a on the said external interface card 25.And, the flash lamp circuit be used to control the flash light emission device etc. is installed on this flash generator circuit board 26, simultaneously, utilize cable components 26a to connect capacitor of flash lamp device 26b, be used for store power, make the illuminating part 16 of flash light emission device carry out luminous.

And, on this flash generator circuit board 26 and main circuit board 22, be respectively arranged with connecting connector 26c, 22c, connect this two circuit boards by this connector 26c, 22c.

Moreover, in the casing inside of camera 1,, see it is near the left part, to form battery installation room 18 from the front of camera 1 near on the assigned position of an end, a plurality of power-supply battery 18a as primary power wherein can be installed.In this battery installation room 18, be provided with electric parts such as cell connector (not having diagram), so that accept from the electric power of these indoor power-supply battery 18 supplies.These electric parts are connected on the above-mentioned flash generator circuit board 26 by the general connected mode (not shown) of regulation.Like this, the electric power of power-supply battery 18a just can supply on the flash generator circuit board 26.

Moreover, casing inside at camera 1, arranged LCD display device 27 such as (LCD) on the assigned position of cardinal principle central portion overleaf, simultaneously on the assigned position in its vicinity, arranged display circuit board (not having diagram), the display circuit that is used to control this display device 27 has been installed on this plate.And, display device 27 is connected on the main circuit board 22 by this display circuit board.

Below describe the formation of the inner set photographic optical system of imaging lens unit 14 in the camera 1 of present embodiment in detail.

Fig. 4 is the figure that the inside of imaging lens unit 14 of the camera 1 of expression present embodiment constitutes overview, is the sectional drawing along Z-Z line shown in Figure 2.And, in Fig. 2, only express and relate to part of the present invention, promptly mainly express the arrangement states of the constitutional detail of being arranged in photographic optical system and the light path thereof, omitted and directly do not related to part of the present invention, be a part of constitutional detail of imaging lens unit 14 etc., purpose is to prevent that accompanying drawing is complicated.

In the inside of the imaging lens unit 14 of the camera 1 of present embodiment, as shown in Figure 4, arranged the photographic optical system that constitutes by a plurality of lens etc.

This photographic optical system is made of a plurality of lens and catoptron 33 etc., and catoptron 33 wherein is disposed in the light path of these lens, can come the optical axis O of crooked this photographic optical system on prescribed direction according to about 90 (meeting at right angles substantially).

A plurality of lens comprise: constitute two lens (the 1st lens 14aa, the 2nd lens 14ab) of the 1st group of lens 14a, the position of its configuration than catoptron 33 more near object side; Constitute 4 lens (the 3rd lens 14bb etc.) of the 2nd group of lens 14b, the assigned position of its configuration is not in catoptron 33 sides, but in picture pick-up device 23a side.In the case, the lens that more are disposed in the foremost side of camera 1 among the 1st group of lens 14a near object side than catoptron 33 are the 1st lens 14aa.And the locational lens that are disposed among the 1st group of lens 14a near catoptron 33 are the 2nd lens 14ab.Moreover allocation position is the 3rd lens 14bb than the locational lens that catoptron 33 more is disposed among the 2nd group of lens 14b near picture pick-up device 23a near catoptron 33.

The 1st group of lens 14a supported by support accessory 32.The 1st group of lens 14a is disposed on the assigned position of casing inside and makes its optical axis substantially perpendicular to the face of the front that comprises this camera 1.And the 1st lens 14aa among the 1st group of lens 14a that is supported by support accessory 32 is disposed on the position of tight back of the 11a of lens openings portion of protecgulum 11.

At the rear of the 1st group of lens 14a, arrange catoptron 33 and make it with respect to inclined light shaft 45 degree.This catoptron 33 is supported from the back side by the support accessory of no illustrated regulation.And the reflecting surface 33a of this catoptron 33 is arranged to one side towards picture pick-up device 23a.

So the subject light beam of injecting from the 11a of lens openings portion utilizes its reflex to reflect by after the 1st group of lens 14a on the reflecting surface 33a of catoptron 33, make its light path be bent about 90 degree (vertical substantially).Like this, this subject light beam advances to the 2nd group of lens 14b side, after by the 2nd group of lens 14b, is directed on the sensitive surface of picture pick-up device 23a.

That is to say that this catoptron 33 is set in the light path by the 1st, the 2nd group of photographic optical system that lens 14a, 14b constitute, it has the effect of so-called bending optical system, is used for this light path is carried out bending.

Moreover, on the reflecting surface 33a as reflection unit of this catoptron 33, on the position beyond the intrafascicular position that should inject of the object light of injecting to this catoptron 33, a kind of unwanted light reflection unit member 33b (referring to Fig. 5) that prevents is set as preventing the unwanted light reflection unit; Be used to prevent the light reflection.Fig. 5 is illustrated in and only extracts catoptron 33 out in the component part of photographic optical system of camera 1 of present embodiment and represented that it expresses reflecting surface 33a one side of this catoptron 33.

As shown in Figure 5, in this catoptron 33, respectively with the cardinal principle central portion of the 1st group of lens 14a and the 2nd group of face that lens 14b is relative, in specialized range, formed reflecting surface 33a, on the other hand, on near the regulation position the circumference of this catoptron 33, on the position beyond the reflecting surface 33a, formed and prevented unwanted light reflecting member 33b.That is to say that reflecting surface 33a only is disposed on the part of injecting of the light beam (subject light beam) that is used to form the subject image as the reflection unit of this catoptron 33.

Near catoptron 33, by these catoptron 33 bendings the light path of light on, arranged shutter aperture unit 34.This shutter aperture unit 34 is made of shutter part and aperture part etc., and these parts are used to limit injects the interior subject light beam of this photographic optical system etc., and light quantity is injected in control.

Be furnished with the 2nd group of lens 14b at the rear of this shutter aperture unit 34.The 2nd group of lens 14b is made of above-mentioned 4 lens, and each lens is arranged on the assigned position abreast, and its direction is substantially perpendicular to the front of this camera 1.In the case, each lens is remained on the assigned position in lens barrel inside respectively by 31 supportings of lens barrel part.

And, arranged picture pick-up device 23a at the rear of the 2nd group of lens 14b.This picture pick-up device 23a is mounted on the imaging circuit plate 23 as mentioned above, like this, the subject light beam that is injected into imaging lens unit 14 inside from the 11a of lens openings portion is through the 1st group of lens 14a, catoptron 33, shutter aperture unit 34, the 2nd group of lens 14b, arrive picture pick-up device 23a, make the subject image on its sensitive surface, carry out imaging.

The photographic optical system of the imaging lens unit 14 of Gou Chenging like this, it is provided with state and can uses focal adjustments mechanism 45 grades of the regulation that comprises motor 44 to move freely on the direction of the arrow X shown in the circle 4, can carry out the focal adjustments action like this.

In the case, picture pick-up device 23a and imaging circuit plate 23 are fixed together at the casing of camera 1 motionless part (frame parts) inner and imaging lens unit 14, form an integral body.

That is to say that the method for carrying out of the focal adjustments of the camera 1 of present embodiment action is: utilize basis such as above-mentioned focal adjustments mechanism 45 to leave the big or small interval of coming between accommodation reflex mirror 33 and the picture pick-up device 23a of the distance of subject.

That is to say, imaging lens unit 14, comprising catoptron 33, the 1st group of lens 14a, the 2nd group of lens 14b and to its support accessory that supports 32, mirror letter part 31 etc., movable part in the imaging lens unit 14, the motionless part (frame parts) with respect to imaging lens unit 14 moves on the arrow directions X of Fig. 4 along with the focal adjustments action.

The movable part of imaging lens unit 14 constitutes as a whole, incorporate so movable part rack is located on a kind of guide rod (axis of guide) 35, and this guide rod 35 carries out the axle supporting by the arm 30 on the motionless part (frame parts) that is formed on same imaging lens unit 14.And, between this movable part and motionless part (frame parts), set up a kind of elastic parts 36 such as inotropic volute spring that have.Like this, there is a kind of elastic force to act on all the time on the movable part of imaging lens unit 14 to arrow X1 direction shown in Figure 4.

And, between the rearward end and picture pick-up device 23a of lens barrel part 31, a kind of focal adjustments mechanism 45 is set, comprising the whole motor 44 that moves of movable part that is used to make imaging lens unit 14, in the command signal of having received regulation, for example from shutter button release 17 mutually after the command signal of the shutter release switch of interlock (do not have diagram), the focal adjustments action that begins to stipulate.

Moreover, utilizing the focal adjustments mechanism 45 of regulation to make photographic optical system in the imaging lens unit 14 of this camera 1 is to carry out the focal adjustments action and move to the direction of regulation, its result, the optical axis direction prescribed direction of the 1st group of lens 14a (the arrow directions X of Fig. 4) moves.

Like this, in the camera 1 of present embodiment, become elongated rectangle substantially with the opening shape of the 1st group of corresponding lens openings 11a of portion of lens 14a, its long limit is along on the direction of arrow X.That is to say, can make as the opening size of the 11a of lens openings portion of subject light beam entrance window and to be injected into the 1st group of subject light beam in the lens 14a and to pass through, the state that is set of the size of this long side direction is simultaneously: no matter the catoptron 33 and the distance between the picture pick-up device 23a that change with the focal adjustments action are set at bee-line or are set at longest distance, all can make to be injected into the interior subject light beam of the 1st group of lens 14a and to pass through.In Fig. 4, the distance between catoptron 33 and the picture pick-up device 23a all can be passed through for the most in short-term light L1 and the distance between catoptron 33 and the picture pick-up device 23a light L2 when the longest.

And the size of the long side direction of the 11a of lens openings portion is set according to the moving range of the 1st group of lens 14a.

General trend is: short more by the focal length that this photographic optical system is set, promptly the picture visual angle is wide more, and the amount of movement of the lens of the photographic optical system when carrying out the focal adjustments action is more little.That is to say that well-known, wide-angle lens is more little to carrying out the required lens moving of focal adjustments action the proximal most position from infinity (∞) position of lens.

And, utilize minimum distance that photographic optical system can carry out focal adjustments action to set slightly biggerly for well, for example, when being set at the about 1m of distance, with be set at than 1m nearer apart from the time compare, the focal adjustments of utilizing much smaller lens moving just can finish from infinity (∞) position to proximal most position is moved, and this also is well-known.

So in the present embodiment, as mentioned above, the optical axis O of the 1st group of lens 14a casing with respect to camera on the directions X of Fig. 4 moves.Consider above-mentioned situation, can when design, will fully reduce lens moving on the one hand, guarantee the focal adjustments action of necessary photographic optical system on the other hand.

But, adopt the photographic optical system of the bending optical system that constitutes like this, owing to the light beam after mirror 33 reflection that is reflected to reasons such as unwanted direction reflections, it is unfavorable to cause forming the subject image, is easy to generate harmful light that can cause ghost image and flicker etc. etc.

As present embodiment, adopted the photographic optical system of bending optical system with catoptron 33, be that the photographic optical system of past general type of the structure of straight line is compared with optical axis, more be easy to generate harmful light, this is known.

So, in the imaging lens unit 14 in the camera 1 of present embodiment, near being suppressed at catoptron 33, produce harmful light, take following measure.

That is to say, on the face that locational the 2nd lens 14ab of the most close catoptron 33 and lens 33 are relative in the 1st group of lens 14a, arranged shape as shown in Figure 6 conduct the 1st iris apparatus the 1st prevent to reflect part 41.This prevents that reflecting member 41 from being made by a kind of sheeting of circle, and this circular diameter equals the outside dimension of the 2nd lens 14ab substantially, produces the opening 41a that is substantially square shape on the central part substantially at it, and its 4 bights are cut off.And Fig. 6 represents the 1st shape that prevents reflecting member 41 when arrow B direction shown in Figure 4 is watched.

And, the 1st prevents that the subject image that useful light that reflecting member 41 does not cut off helps to be formed by the subject light beam from carrying out imaging on the imaging surface of picture pick-up device 23a, remaining useless light, for example oblique ray of being represented by symbol W1 in Fig. 4 etc. is interdicted.And, prevent to carry out on the surface of reflecting member 41 tarnish (matte) the 1st and handle to wait and prevent that reflection from handling.

On the other hand, in the 2nd group of lens 14b, near the relative face of locational the 3rd lens 14bb of the most close catoptron 33 and catoptron 33, be provided with the 3rd iris apparatus.The 3rd iris apparatus is used to cut off useless light, and for example represented oblique ray of symbol W2 etc. among Fig. 4 does not cut off the useful light that helps to form the subject image.

Therefore, the 3rd iris apparatus in the present embodiment limits the part of the subject light beam that catoptron 33 is reflected, the light that helps to form the subject image is injected in the 3rd lens 14bb, utilizes to have the 3rd of a kind of peristome and prevent that reflecting member 43 from constituting for this reason.The 3rd prevents that reflecting member 43 is set in the space between the 3rd lens 14bb and the catoptron 33, near the face of the relative side of the 3rd lens 14bb and catoptron 33.And the 3rd prevents that the shape of the peristome of reflecting member 43 from preventing that with the above-mentioned the 1st the shape of opening 41a of reflecting member 41 is identical substantially.

In the case, prevent to produce plurality of gaps between reflecting member 43 and the 3rd lens 14bb the 3rd, so, a part that is injected in the light in the 3rd lens 14bb by the 3rd peristome that prevents reflecting member 43 reflects near the outer peripheral edges portion of the 3rd lens 14bb, so, also might produce the useless irregular reference that is helpless to form the subject image.

Therefore, in the present embodiment, the diameter of the 3rd lens 14bb (symbol D1 shown in Figure 4) is set at peristome internal diameter size (symbol D2 shown in Figure 4) greater than the 3rd iris apparatus (the 3rd prevents reflecting member 43).So, the light that is injected into the 3rd lens 14bb is passed through near the cardinal principle central portion of the 3rd lens 14bb, prevent that a part of incident ray from reflecting near the outer peripheral edges portion of the 3rd lens 14bb.And, prevent that for the 3rd the surface of reflecting member 43 from also preventing that with the above-mentioned the 1st the reflecting member 41 the same tarnish processing grades of carrying out from preventing the reflection processing.

On the other hand, on the regulation wall in the space between the 1st group of lens 14a and the 2nd group of lens 14b, promptly on the outside wall surface to the 1st group of support accessory that lens 14a supports 32, on the wall 32a that can accept, arrange a kind ofly to prevent reflecting member 42 as the 2nd of the 2nd iris apparatus from the position of the folded light beam of catoptron 33.The 2nd prevents reflecting member 42, the purpose of its setting is to cut off a kind of so useless light W3, and this light W3 is meant by from the subject light beam of the 1st group of lens 14a toward mirror 33 and through the light in the outside of assigned position (the represented position of symbol Q of Fig. 4) catoptron 33 reflection back the 2nd group of lens 14b of directive, subject light beam outermost light intersection separately.

The 2nd prevents reflecting member 42 as shown in Figure 7, Yi Bian utilize the sheeting of the channel shape that opening is arranged to make, and be provided with the breach 42a that is circular arc substantially, this breach is expanded to peristome from central portion substantially.And Fig. 7 represents the 3rd shape that prevents reflecting member 43 when arrow B direction shown in Figure 4 is watched.

And, the 2nd of formation the prevent that the light that reflecting member 42 will cut off from being useless light like this, represented oblique ray of symbol W3 etc. among Fig. 4 for example, other light that do not cut off are to help the light that carries out imaging from the formed subject image of the light beam of subject on the imaging surface of picture pick-up device 23a.And, prevent that to the 2nd the surface of reflecting member 42 from also with to the above-mentioned the 1st preventing that the reflecting member 41 the same tarnish processing grades of carrying out from preventing the reflection processing.

As mentioned above, if adopt the foregoing description, then catoptron 33 is arranged on the light path between the 1st group of lens 14a and the 2nd group of lens 14b, be bent to plumbness substantially so see through the light path of the subject light beam of the 1st group of lens 14a, guide the 2nd group of lens 14b one side into, the transmitted light beam that sees through the 2nd group of 14b is drawn towards on the sensitive surface of picture pick-up device 23a, makes the subject image in this imaging.In the case, on structure, the 1st group of lens 14a that is arranged on the position before carrying out bending by the light path of 33 pairs of subject light beams of catoptron constitutes, can realize necessary minimal light-focusing function with the sheet number of the minimum limit of necessity, simultaneously photographic optical system integral body is moved on the arrow directions X of Fig. 4, guarantee sufficient focal adjustments function on one side, so, help the body of camera 1 on fore-and-aft direction, to realize slimming, improve the portability of camera 1 greatly.

And, be injected into catoptron 33 tight regulation in front positions and penetrate on the regulation position of tight back at the object light bundle from the reflected light of the subject light beam of catoptron 33, arrange a kind of a plurality of aperture part (the 1st prevents that reflecting member the 41, the 2nd from preventing that reflecting member the 42, the 3rd from preventing reflecting member 43), be used for cutting off or preventing useless light, on the reflecting surface 33a of catoptron 33, arrange simultaneously and prevent unwanted light reflecting member 33b, taked to cut off completely or prevented useless light measure, so, can obtain the subject image of kilter at an easy rate.

And, with picture pick-up device 23a be the subject image capturing device so-called ordinary digital camera as an example, describe the camera 1 of the foregoing description in detail.But be not limited in this, the present invention can be applicable to the photographic film to be the general camera of subject image capturing device at an easy rate.

The effect of invention

As mentioned above, if adopt the present invention, then can provide so a kind of camera, its light of photographing System has a kind of curved optical system that has arranged reflection unit in the light path of optical system System, unwanted during to the intrafascicular formation subject of the object light of injecting image in this camera Useless light cuts off, and can make the subject image imaging of unusual kilter in regulation Imaging surface on.

And, so a kind of camera can be provided, namely adopt on the one hand to have bending optical system Photographic optical system, can realize on the other hand helping the thin type of camera fore-and-aft direction Make the camera integral miniaturization.

Claims (1)

1. camera is characterized in that having:

The 1st group of lens, it is made of a plurality of lens, wherein injects the light beam from subject;

Reflection unit is used to make the transmitted light of injecting by above-mentioned the 1st group of lens from object side reflecting with the perpendicular direction of the optical axis of the 1st group of lens substantially;

The subject image capturing device, it is disposed in by above-mentioned reflection unit is undertaken on the position of the subject image imaging that beam reflected forms, and constitutes an integral body with frame parts;

Focal adjustments mechanism moves above-mentioned reflection unit, carries out the focal adjustments action of subject image by the interval that changes above-mentioned reflection unit and subject image capturing device; And

Subject light beam entrance window, it is formed on the crust component, above-mentioned subject light beam entrance window is elongated shape, the direction that the direction on its long limit moves with the focal adjustments action along above-mentioned the 1st group of lens, no matter make when the above-mentioned reflection unit that moves with the focal adjustments action and the distance between the subject image capturing device still are set to longest distance when being set to bee-line, all can make to be injected into the interior subject light beam of above-mentioned the 1st group of lens and to pass through.

Images