WO2018051645A1 - Dispositif lentille - Google Patents

Dispositif lentille Download PDF

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Publication number
WO2018051645A1
WO2018051645A1 PCT/JP2017/027077 JP2017027077W WO2018051645A1 WO 2018051645 A1 WO2018051645 A1 WO 2018051645A1 JP 2017027077 W JP2017027077 W JP 2017027077W WO 2018051645 A1 WO2018051645 A1 WO 2018051645A1
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WO
WIPO (PCT)
Prior art keywords
light receiving
operation ring
reflective
light
ring
Prior art date
Application number
PCT/JP2017/027077
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English (en)
Japanese (ja)
Inventor
康照 山内
Original Assignee
ソニー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ソニー株式会社 filed Critical ソニー株式会社
Priority to CN201780054246.9A priority Critical patent/CN109804289A/zh
Priority to JP2018539551A priority patent/JP6973398B2/ja
Publication of WO2018051645A1 publication Critical patent/WO2018051645A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses

Definitions

  • the present technology relates to a lens apparatus provided with an operation ring such as a focus operation ring or a zoom operation ring, and particularly relates to a technical field for detecting the rotation amount or rotation direction of the operation ring.
  • optical elements such as lenses are arranged inside, and the optical elements are moved in the optical axis direction by rotating the operation ring provided on the outer peripheral side.
  • Some are configured to allow focusing and zooming.
  • the mechanical drive system is a system in which a cam ring for moving an optical element and an operation ring are mechanically connected, and a force corresponding to the rotation of the operation ring is mechanically transmitted to the cam ring to move the optical element.
  • the mechanical connection between the cam ring and the operation ring is performed by parts such as a gear, a roller, and a key.
  • the rotation amount and rotation direction of the operation ring are electrically read by a predetermined sensor, the optical circuit drive amount is calculated by an arithmetic circuit, and the drive circuit drives the actuator based on the calculated drive amount.
  • the optical element is moved.
  • the electric drive system moves the optical element with an electric actuator, it is easy to move the optical element at high speed. Furthermore, since the cam ring used in the mechanical drive system can be omitted, the lens device can be reduced in size.
  • the electric drive method is classified into an “acceleration method” and a “direct reading method” depending on a method of electrically reading the rotation amount and the rotation direction of the operation ring.
  • the speed increasing method is a method in which the rotation of the operation ring is increased by a gear and the increased rotation is read by a rotation detecting device.
  • the speed increasing method has an advantage that the detection resolution of the amount of rotation can be increased although the operation ring rotation speed is increased with a gear, which does not reach the mechanical driving method.
  • hysteresis in the rotation direction of the operation ring is likely to occur due to backlash of the speed increasing gear.
  • the lens frame that holds the lens is extended / retracted by the cam ring.
  • the rotation detection device is large, and if the rotation detection device is arranged inside the lens device, it interferes with the lens frame. Resulting in. In order to avoid this interference, it is necessary to secure an arrangement space for the rotation detection device in the radial direction of the lens device, and as a result, enlargement of the lens device is promoted.
  • a reflective surface and a non-reflective surface are alternately arranged on the inner peripheral surface of the operation ring, and a light emitting element and a light receiving element are disposed at positions facing the reflective surface.
  • a photoreflector is arranged, the light emitted from the light emitting element with the rotation of the operation ring and reflected by the reflecting surface is received by the light receiving element, and the output waveform is read according to the intensity change of the received light ( (See paragraph [0002] for example).
  • two photo reflectors are provided in order to detect the rotation direction of the operation ring.
  • the two photo reflectors are arranged such that the output waveforms of the light receiving elements have a phase difference of 90 degrees, for example.
  • the rotation direction of the operation ring can be detected based on the phase relationship between the output waveforms.
  • the direct reading method does not cause hysteresis in the operation ring rotation direction, which is a problem in the acceleration method, and the photoreflector is small, and can be suitably applied to a lens apparatus that performs a retracting operation.
  • the direct reading method it is possible to increase the detection resolution of the amount of rotation by narrowing the pitch between the reflective surface and the non-reflective surface, but the pitch between the reflective surface and the non-reflective surface is narrowed for higher resolution. As described above, the variation in phase difference cannot be ignored. That is, in the conventional direct reading method, the formation pitch of the reflecting surface and the non-reflecting surface cannot be sufficiently narrowed due to the position error between the two photo reflectors, and there is a limit to improving the detection resolution.
  • an object of the present technology is to improve the detection resolution of the operation ring rotation amount while suppressing the enlargement of the lens device.
  • a lens apparatus includes an operation ring that is rotated, a light emitting element that emits light, and a plurality of light receiving elements, which are alternately arranged in the rotation direction of the operation ring and move as the operation ring rotates.
  • a detection pattern portion having a reflecting surface and a non-reflecting surface is provided, the light emitting element emits light to the detection pattern portion, and the plurality of light receiving elements are disposed on the same substrate, It receives reflected light.
  • the positional relationship between the light receiving elements is determined with high accuracy, and the tolerance for narrowing the detection pattern by the reflecting surface and the non-reflecting surface is increased. Further, since the direct reading method is adopted, the cam ring used in the mechanical drive method can be omitted.
  • the light receiving surfaces of the plurality of light receiving elements are arranged to face the reflecting surface.
  • the reflected light is efficiently received by the light receiving element.
  • the light receiving element includes two light receiving elements, a first light receiving element and a second light receiving element, and the light emitting element emits light in the direction in which the reflecting surface and the non-reflecting surface are aligned. It is desirable that the surface center is located between the light receiving surface center of the first light receiving element and the light receiving surface center of the second light receiving element.
  • the number of light emitting elements to be provided is one when each of the two light receiving elements receives the reflected light from the reflecting surface.
  • At least a part of the first light receiving element and at least a part of the second light receiving element are positioned within the arrangement range of the light emitting elements in the arrangement direction. desirable.
  • all of the first light receiving elements and all of the second light receiving elements are positioned within the arrangement range of the light emitting elements in the arrangement direction.
  • At least a part of the first light receiving element and the second light receiving element are within the arrangement range of the light emitting elements in the pattern orthogonal direction that is the axial direction of the rotation axis of the operation ring. It is desirable that at least a part of is located.
  • all of the first light receiving elements and all of the second light receiving elements are located within an arrangement range of the light emitting elements in the pattern orthogonal direction.
  • the lens device includes a first substrate on which the light emitting elements are disposed, and a second substrate that is the substrate on which the plurality of light receiving elements are disposed is disposed on the first substrate. It is desirable.
  • the widths of the reflective surface and the non-reflective surface in the arrangement direction in which the reflective surface and the non-reflective surface are arranged are each 0.3 mm or less.
  • the reflective surface is formed as a part of the inner peripheral surface of the operation ring
  • the non-reflective surface is a non-reflective carrier formed on the inner peripheral surface of the operation ring. It is desirable that it is formed as an inner surface.
  • the reflective surface is formed as a part of the inner peripheral surface of the operation ring made of metal, or the inner peripheral surface of the metal-plated operation ring, for example. This makes it possible to increase the deterrence against damage or breakage of the reflective surface over time as compared with the case where the reflective surface is formed by printing.
  • the non-reflective carrier is formed in a film shape.
  • the protrusion amount of the non-reflective carrier is suppressed, and the space to be secured between the light receiving element and the light emitting element and the detection pattern portion can be reduced.
  • the non-reflective carrier is a protrusion protruding in the inner peripheral direction of the operation ring.
  • the non-reflective surface is formed as a part of the inner peripheral surface of the operation ring, and the reflective surface is an inner surface of a reflective carrier formed on the inner peripheral surface of the operation ring. It is desirable to be formed as.
  • the non-reflective surface is formed as a part of the inner peripheral surface of the operation ring, so that the operation ring can be formed of a general-purpose resin.
  • the reflective carrier is formed in a film shape.
  • the protrusion amount of the reflection carrier is suppressed, and the space to be secured between the light receiving element and the light emitting element and the detection pattern portion can be reduced.
  • a ring-shaped member that rotates integrally with the operation ring is provided on the inner peripheral side of the operation ring, and the non-reflective surface is a part of the inner peripheral surface of the operation ring.
  • the reflection surface is formed as an inner surface of a reflection carrier positioned at a predetermined interval in the rotation direction in the ring-shaped member, In the ring-shaped member, it is preferable that at least a non-position portion of the reflection carrier in the rotation direction is transparent.
  • the operation ring can be formed of a general-purpose resin.
  • the reflective carrier is formed on the inner peripheral surface of the ring-shaped member.
  • a ring-shaped member that rotates integrally with the operation ring is provided on the inner peripheral side of the operation ring, and the reflection surface is formed as a part of the inner peripheral surface of the operation ring.
  • the non-reflective surface is formed as an inner surface of a non-reflective carrier positioned at a predetermined interval in the rotation direction in the ring-shaped member, and the ring-shaped member is at least a non-position of the non-reflective carrier in the rotational direction. It is desirable that the part is transparent.
  • the reflecting surface is formed as a part of the inner peripheral surface of the operation ring, the reflecting surface is a part of the inner peripheral surface of the operation ring made of metal or the inner surface of the operation ring plated with metal, for example. As compared with the case where the reflective surface is formed by printing, it is possible to increase the deterrence against damage and breakage of the reflective surface over time.
  • the non-reflective carrier is formed on the inner peripheral surface of the ring-shaped member.
  • the first light receiving element and the second light receiving element are provided as the light receiving elements, the first light receiving signal which is a light receiving signal of the first light receiving element, and the second light receiving element.
  • An arithmetic circuit is provided that calculates the rotation amount of the operation ring based on a second light reception signal that is a light reception signal of the element and a plurality of threshold values set for each of the first light reception signal and the second light reception signal. It is desirable.
  • the rotation amount is calculated based on a plurality of points in the waveforms of the first light receiving signal and the second light receiving signal.
  • the arithmetic circuit calculates the rotation amount using a plurality of reference coordinates set on the Lissajous circle as thresholds for the first light receiving signal and the second light receiving signal. Is desirable.
  • the present technology it is possible to improve detection resolution with respect to the amount of rotation of the operation ring while suppressing an increase in the size of the lens device.
  • the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.
  • FIG. 1 is a schematic external perspective view of a lens device as a first embodiment.
  • FIG. 2 is a schematic perspective view when the lens apparatus is cut in a direction perpendicular to the optical axis at the position of line A-A ′ shown in FIG. 1. It is an enlarged view of the part shown with the broken line in FIG.
  • It is a schematic diagram of the detection pattern part in embodiment. It is the schematic perspective view which looked at the detection part from the operation ring side. It is the figure which represented typically the positional relationship of a detection part and a detection pattern part. It is a front view of a detection part. It is the figure which represented typically a mode that the detection pattern part and the light emission surface, the light-receiving surface, and the light-receiving surface are facing.
  • FIG. 1 is a schematic external perspective view of the lens device 1
  • FIG. 2 is a schematic perspective view when the lens device 1 is cut in a direction orthogonal to the optical axis Axo of the lens device 1 at the position of line AA ′ shown in FIG. 3 is an enlarged view of a portion indicated by a broken line in FIG.
  • the lens device 1 is configured as an interchangeable lens that is detachable from a camera device body (camera body) (not shown), and has a substantially cylindrical outer shape.
  • the axial direction of the optical axis Axo is defined as the front-rear direction of the lens device 1.
  • the side attached to the camera device body is defined as the rear side, and the opposite side is defined as the front side.
  • the lens device 1 includes two operation rings including a focus operation ring 2f that is an operator that performs focus adjustment and a zoom operation ring 2z that is an operator that performs zoom adjustment, and a camera device body that is positioned at the rear end.
  • An attachment / detachment unit 3 having an attachment / detachment mechanism, a front lens 4 that is positioned at the front end and guides light from the subject to the inside of the lens device 1, and a lens housing unit 5 that supports the focus operation ring 2f and the zoom operation ring 2z. I have.
  • the focus operation ring 2f and the zoom operation ring 2z are spaced apart in the axial direction of the optical axis Axo, and the outer peripheral surface is exposed to the outside.
  • the rotation axes of the focus operation ring 2f and the zoom operation ring 2z are substantially coincident with the optical axis Axo, respectively. That is, the rotation directions of the focus operation ring 2f and the zoom operation ring 2z substantially coincide with the direction around the optical axis Axo.
  • the rotation direction of the focus operation ring 2f is referred to as “rotation direction R” (see FIG. 3).
  • the lens housing portion 5 represents a portion excluding the focus operation ring 2f and the zoom operation ring 2z in a cylindrical portion covering various optical elements arranged inside the lens device 1.
  • a fixed focus lens for example, a fixed focus lens, a movable focus lens, a variable power lens, an iris, a relay lens, and the like are provided in order from the front side.
  • the movable focus lens moves along the optical axis Axo to perform focus adjustment.
  • the zoom operation ring 2z is rotated, the zoom lens moves along the optical axis Axo to perform zoom adjustment.
  • the movable focus lens is driven according to the rotation operation of the focus operation ring 2 f by the electric drive method described above. That is, an actuator for driving the movable focus lens is provided in the lens device 1. This point will be described later.
  • a fixing member 6 having a substantially annular shape is disposed on the inner peripheral side of the focus operation ring 2f (see FIGS. 2 and 3).
  • the position of the fixing member 6 is fixed inside the lens device 1, and the outer peripheral surface 6a is positioned to face the inner peripheral surface 2fa of the focus operation ring 2f.
  • a substantially circular opening M is formed on the inner peripheral side of the fixing member 6.
  • Detecting pattern portions 22 in which reflecting surfaces 20 and non-reflecting surfaces 21 are alternately arranged in the rotation direction R are provided at positions facing the outer peripheral surface 6 a of the fixing member 6.
  • an alternating repeating pattern of the reflecting surface 20 and the non-reflecting surface 21 is formed over the entire circumference in the rotation direction R.
  • the focus operation ring 2f is made of a metal having a high light reflectance such as aluminum, and the inner peripheral surface 2fa is a metal surface. Further, on the inner peripheral surface 2fa of the focus operation ring 2f, non-reflective carriers 7 made of a resin material having a low light reflectivity such as black resin are arranged along the rotation direction R at a predetermined interval. These non-reflective carriers 7 are formed in a film shape by, for example, printing.
  • the non-reflective surface 21 is formed as the inner surface of the non-reflective carrier 7.
  • the inner surface is a surface facing the optical axis Axo side.
  • the reflecting surface 20 is formed as a part of the inner peripheral surface 2fa of the focus operation ring 2f. That is, the non-arranged portion of the non-reflective carrier 7 on the inner peripheral surface 2fa that is a metal surface functions as the reflective surface 20.
  • the focus operation ring 2f does not need to be made of metal, and it is sufficient that the light reflectance of the inner peripheral surface 2fa is increased, for example, metal plating or a light reflecting sheet is applied to the inner peripheral surface 2fa.
  • each reflective surface 20 is formed as a part of the inner peripheral surface 2fa of the focus operation ring 2f, and each non-reflective surface 21 is formed as the inner surface of the non-reflective carrier 7 formed on the inner peripheral surface 2fa. Yes. For this reason, the detection pattern unit 22 moves in the rotation direction R along with the rotation of the focus operation ring 2f.
  • the formation pitch of the reflective surface 20 and the non-reflective surface 21 is set to a constant pitch. That is, as shown in the schematic diagram of FIG. 4, in the detection pattern portion 22, the width w ⁇ b> 20 in the rotation direction R of each reflection surface 20 and the width w ⁇ b> 21 in the rotation direction R of each non-reflection surface 21 coincide. In this example, the width w20 and the width w21 are set to 0.3 mm or less. As a result, it has been confirmed that a sufficient detection resolution for practical use can be obtained.
  • a wiring board 8 which is a flexible board, is fixed at a predetermined position on the outer peripheral surface 6 a of the fixing member 6.
  • a detecting unit 9 for detecting the rotation amount and the rotation direction of the focus operation ring 2f is arranged.
  • FIG. 5 is a schematic perspective view of the detection unit 9 as viewed from the focus operation ring 2f side. In FIG. 5, a part of the wiring board 8 is also shown.
  • the detection unit 9 includes a light emitting element 10, a first light receiving element 11 and a second light receiving element 12, a substrate 13, and a cover part 14.
  • the light emitting element 10 has a light emitting surface 10 a that emits light, and is disposed on the wiring substrate 8 in a direction in which the light emitting surface 10 a faces the detection pattern portion 22.
  • the first light receiving element 11 and the second light receiving element 12 are both disposed on the substrate 13, and the substrate 13 has the light receiving surface 11 a of the first light receiving element 11 and the light receiving surface 12 a of the second light receiving element 12 facing the detection pattern portion 22. It arrange
  • the wiring board 8 corresponds to a “first board”, and the board 13 corresponds to a “second board”.
  • the first light receiving element 11 and the second light receiving element 12 are disposed on the substrate 13 by a single semiconductor manufacturing process.
  • the cover portion 14 protrudes from the wiring board 8 in the thickness direction, and is formed as a portion that covers the periphery of the light emitting element 10, the first light receiving element 11, and the second light receiving element 12.
  • the cover 14 prevents unintended light such as outside light from leaking into the first light receiving element 11 and the second light receiving element 12. Further, it is possible to prevent foreign matters such as dust from adhering to the light emitting surface 10a, the light receiving surface 11a, and the light receiving surface 12a. Therefore, it is possible to improve the detection accuracy for the rotation amount and the rotation direction.
  • FIG. 6 schematically shows the positional relationship between the detection unit 9 and the detection pattern unit 22.
  • FIG. 6 shows the positional relationship between the detection unit 9 and the detection pattern unit 22 as viewed from the optical axis Axo side, and the detection unit 9 is shown in a transparent state.
  • the light emitting element 10, the first light receiving element 11, and the second light receiving element 12 in the detection unit 9 are positioned to face the detection pattern unit 22.
  • the direction indicated by the double arrow “X” in FIG. 6 is the direction in which the reflective surface 20 and the non-reflective surface 21 in the detection pattern portion 22 are arranged, and is hereinafter referred to as “alignment direction X”.
  • the arrangement direction X is a direction parallel to the tangential direction of the rotation direction R.
  • the arrangement direction X is a direction that coincides with the rotation direction R.
  • the “rotation direction R” is used for the focus operation ring 2 f
  • the “alignment direction X” is used for the pattern of the reflection surface 20 and the non-reflection surface 21.
  • the direction indicated by the double arrow “Y” in FIG. 6 is the axial direction of the rotation axis of the focus operation ring 2f.
  • the direction indicated by “Y” is a direction orthogonal to the arrangement direction X, and is hereinafter referred to as “pattern orthogonal direction Y”.
  • FIG. 7 is a front view of the detection unit 9, and FIG. 8 is a diagram schematically showing a state in which the detection pattern unit 22 faces the light emitting surface 10a, the light receiving surface 11a, and the light receiving surface 12a.
  • illustration of the cover part 14 is abbreviate
  • the center of the light emitting surface 10a is represented as a center c0
  • the center of the light receiving surface 11a is represented as a center c1
  • the center of the light receiving surface 12a is represented as a center c2.
  • the center c0 is positioned between the center c1 and the center c2 in the arrangement direction X.
  • the center c0 is positioned at the midpoint between the center c1 and the center c2 in the arrangement direction X.
  • the light emitting element 10 emits divergent light from the light emitting surface 10a to the detection pattern portion 22 as represented by the solid line arrow in FIG.
  • the reflected light from the reflecting surface 20 is represented by a broken-line arrow.
  • the light is guided to the light receiving surface 11a and the light receiving surface 12a through the reflecting surface 20, respectively. That is, when the reflected light from the reflecting surface 20 is received by the first light receiving element 11 and the second light receiving element 12, only one light emitting element 10 should be provided.
  • the detection unit 9 has the following characteristics regarding the arrangement relationship of the light emitting element 10, the first light receiving element 11, and the second light receiving element 12. That is, in FIG. 7, when the arrangement range of the light emitting elements 10 in the arrangement direction X is “rx”, at least a part of the first light receiving element 11 and at least a part of the second light receiving element 12 in the arrangement range rx. Is located. FIG. 7 shows an example in which only a part of each of the first light receiving element 11 and the second light receiving element 12 is positioned within the arrangement range rx.
  • the separation distance between the first light receiving element 11 and the second light receiving element 12 in the arrangement direction X is shortened, and the size of the detection unit 9 in the arrangement direction can be reduced.
  • phase difference is generated between the output signal waveform of the first light receiving element 11 (light receiving signal waveform) and the output signal waveform of the second light receiving element 12.
  • a phase signal the light reception signal by the first light receiving element 11
  • B phase signal the light reception signal by the second light receiving element 12
  • the first light receiving element 11 and the second light receiving element 12 are spaced apart from each other in the alignment direction X so that the phase difference between the A phase signal and the B phase signal is approximately 90 degrees.
  • the first light receiving element 11 and the second light receiving element 12 have a separation distance D in the arrangement direction X (or rotation direction R) of the center c1 and the center c2 that is 1.5 times the width w20 and the width w21.
  • a separation distance D in the arrangement direction X or rotation direction R
  • the center c1 and the center c2 that is 1.5 times the width w20 and the width w21.
  • FIG. 9 shows waveforms of the A-phase signal and the B-phase signal (after I / V conversion) in which the phase difference is 90 degrees.
  • the A-phase signal and the B-phase signal are substantially sinusoidal signals as the reflecting surface 20 and the non-reflecting surface 21 are formed at a constant pitch in the detection pattern unit 22.
  • the lens device 1 includes a drive circuit 50, an I / V conversion unit 51, an A / D conversion unit 52, an arithmetic circuit 53, a drive circuit 54, and an actuator 55, along with each unit described so far.
  • the optical element 56 in the figure is an optical element to be driven at the time of focus adjustment, and the movable focus lens described above corresponds to this example.
  • the drive circuit 50 drives the light emitting element 10 to emit light.
  • the I / V conversion unit 51 performs I / V conversion on the current output by the first light receiving element 11 and the second light receiving element 12 in accordance with the amount of received light, and the A phase signal and the B phase in which the signal intensity is expressed by the voltage. Get a signal.
  • the A / D converter 52 digitally samples the A-phase signal and the B-phase signal obtained by the I / V converter 51 and converts them into digital values with a predetermined gradation.
  • the arithmetic circuit 53 calculates the rotation direction and the rotation amount of the focus operation ring 2f based on the A-phase signal and the B-phase signal converted into digital values by the A / D converter 52, and the rotation direction and rotation amount. Based on the above, a calculation process for obtaining the drive amount of the actuator 55 is performed, and a value indicating the drive amount is instructed to the drive circuit 54.
  • the drive circuit 54 drives the actuator 55 based on the value instructed from the arithmetic circuit 53. Thereby, the optical element 56 is moved according to the rotation operation of the focus operation ring 2f, and focus adjustment is realized.
  • phase of the output waveform from one photoreflector is denoted as A phase
  • phase of the output waveform from the other photoreflector is denoted as B phase.
  • the output waveform is simply represented by a rectangular wave.
  • FIG. 11 shows an output waveform when the formation pitch of the reflecting surface 20 and the non-reflecting surface 21 is a wide pitch (hereinafter referred to as “pitch S”).
  • pitch S the formation pitch of the reflecting surface 20 and the non-reflecting surface 21 is a wide pitch
  • the upper waveform represents a waveform when there is no phase difference error with respect to the A phase
  • the lower waveform represents a waveform when an error in phase difference with respect to the A phase occurs.
  • T0 [s] the difference between the phase angle of 90 degrees between the A phase and the B phase is expressed as T0 [s] / 4.
  • phase angle variation a0 [s] in the figure is added to the output waveform.
  • the phase angle variation a0 [s] needs to satisfy the condition of the following [Equation 1].
  • the lower part of FIG. 11 shows an output waveform when the formation pitch of the reflecting surface 20 and the non-reflecting surface 21 is reduced to n times the pitch S (where 0 ⁇ n ⁇ 1).
  • one period T1 of the output waveform and the phase angle variation a1 [s] can be expressed by the following [Expression 2] and [Expression 3].
  • T1 [s] n * T0 [s] (Formula 2)
  • a1 [s] a0 [s] / n
  • the difference between the phase angles 90 degrees of the A phase and the B phase can be expressed as T1 [s] / 4.
  • the first light receiving element 11 and the second light receiving element 12 are formed on the same substrate 13 as described above. Thereby, the positional relationship between the first light receiving element 11 and the second light receiving element 12 is determined with high accuracy, and the tolerance for narrowing the detection pattern by the reflecting surface 20 and the non-reflecting surface 21 is increased. Therefore, the detection resolution can be improved with respect to the rotation amount of the focus operation ring 2f.
  • FIGS. 12, 13, and 14 are front views of a detection unit 9A as a first modification, a detection unit 9B as a second modification, and a detection unit 9C as a third modification, respectively.
  • the cover 14 is not shown in FIGS.
  • the detection unit 9A is configured to detect the light emitting element 10 in the pattern orthogonal direction Y. It differs from the detection unit 9 in that at least a part of the first light receiving element 11 and at least a part of the second light receiving element 12 are located in the arrangement range ry.
  • FIG. 12 shows an example in which all of the first light receiving elements 11 and all of the second light receiving elements 12 are positioned within the arrangement range ry.
  • the separation distance between the first light receiving element 11 and the second light receiving element 12 in the pattern orthogonal direction Y is short. Then, size reduction in the pattern orthogonal direction Y of the detection unit 9A is achieved. Furthermore, if the first light receiving element 11 and the second light receiving element 12 are all located within the arrangement range ry, the size can be further reduced in the pattern orthogonal direction Y.
  • the detection unit 9B shown in FIG. 13 is different from the detection unit 9 in that all of the first light receiving elements 11 and all of the second light receiving elements 12 are positioned within the coordination range rx of the light emitting elements 10 in the arrangement direction X. . Thereby, the separation distance between the first light receiving element 11 and the second light receiving element in the arrangement direction X is further made shorter than that of the detection unit 9, and the size of the detection unit 9B in the arrangement direction X can be further reduced.
  • the center c0 is not positioned between the center c1 and the center c2 in the arrangement direction X, and is arranged in the order of the center c0, the center c2, and the center c1.
  • the optical axis of the light emitted from the light emitting element 10 is inclined to the side where the first light receiving element 11 and the second light receiving element 12 are disposed, for example, so that the first light receiving element 11 and the second light receiving element 12 respectively.
  • the reflected light from the reflecting surface 20 is received.
  • the arrangement of the centers c may be a center c2, a center c1, and a center c0 other than the arrangement of the centers c0, c2, and c1 as shown in FIG.
  • FIG. 15 is a schematic perspective view of the detection unit 9D as a fourth modification when viewed from the outer peripheral side of the focus operation ring 2f.
  • the wiring board 8 is not used, and the wiring board 8u and the wiring board 8d are used instead.
  • the light emitting element 10 is formed on the wiring board 8u, and the first light receiving element 11 and the second light receiving element 12 are formed on the wiring board 8d.
  • the light emitting element 10, the first light receiving element 11, and the second light receiving element 12 are arranged on different substrates, so that the light emitting element 10, the first light receiving element 11, and the second light receiving element 12 are on the substrate. Even after the arrangement, the positional relationship between the light emitting element 10 and the first light receiving element 11 and the second light receiving element 12 can be adjusted.
  • FIG. 16 is a schematic perspective view showing an enlarged main part of the lens apparatus 1A, and shows an enlarged formation portion of the detection pattern part 22A in the lens apparatus 1A as in FIG.
  • the difference from the lens device 1 is that a projection-like non-reflective carrier 7A is formed instead of the film-like non-reflective carrier 7.
  • the non-reflective carrier 7A is made of, for example, black resin, has a substantially quadrangular prism shape, and protrudes toward the inner peripheral side of the focus operation ring 2f.
  • Each of the non-reflective carriers 7A functions as a non-reflective surface 21A. That is, the non-reflecting surface 21A is formed as the inner surface of the non-reflecting carrier 7A.
  • the reflecting surface 20 and the non-reflecting surface 21A are alternately arranged in the rotation direction R, and the detection pattern portion 22A is configured as an alternately arranged portion of the reflecting surface 20 and the non-reflecting surface 21A.
  • the lens device 1A As described above, it is not necessary to form the non-reflective carrier 7A in a film shape, and the non-reflective surface 21A can be formed even under circumstances where the non-reflective carrier 7A cannot be formed into a film shape by printing or the like. it can.
  • the reflective surface 20 is formed on the inner peripheral surface 2fa by making the focus operation ring 2f made of metal as in the case of the lens apparatus 1 .
  • the focus operation ring 2f is made of resin.
  • the non-reflective carrier 7A can be formed integrally with the focus operation ring 2f.
  • the reflective surface 20 can be realized by forming a reflective material such as metal on the inner peripheral surface 2fa by coating or the like.
  • a protruding reflective carrier is used on the inner peripheral surface 2fa instead of the non-reflective carrier 7A. It can also be formed. In this case, as the reflective carrier, it is sufficient that at least the light reflectance of the inner peripheral surface is increased.
  • FIG. 17 is a schematic perspective view showing an enlarged main part of the lens apparatus 1B as the third embodiment, and an enlarged formation part of the detection pattern part 22B in the lens apparatus 1B as in FIG. Represents.
  • a resin focus operation ring 2fA made of, for example, black resin is provided.
  • the focus operation ring 2fA does not need to be made of resin.
  • the inner peripheral surface 2fa only needs to have a low light reflectance, such as matte processing of the inner peripheral surface 2fa.
  • reflection carriers 15 made of a metal having a high light reflectivity, such as aluminum, are formed at predetermined intervals along the rotation direction R. These reflection carriers 15 are formed into a film shape by printing or the like, for example, and the inner surface of the reflection carrier 15 functions as the reflection surface 20A. That is, the reflection surface 20 ⁇ / b> A is formed as the inner surface of the reflection carrier 15.
  • the non-arranged portion of the reflective carrier 15 functions as the non-reflective surface 21B. Therefore, the non-reflective surface 21B is formed as a part of the inner peripheral surface 2fa of the focus operation ring 2fA. Has been.
  • the reflecting surface 20A and the non-reflecting surface 21B are alternately arranged in the rotation direction R, and the detection pattern portion 22B is configured as an alternately arranged portion of the reflecting surface 20A and the non-reflecting surface 21B.
  • the non-reflective surface 21B is formed as a part of the inner peripheral surface 2fa as described above, so that the focus operation ring 2fA can be formed of a general-purpose resin. Therefore, cost reduction can be achieved.
  • the reflective carrier 15 is formed in a film shape. Thereby, in the radial direction of the lens device 1B, the amount of protrusion of the reflection carrier 15 is suppressed, and the space to be secured between the detection unit 9 and the detection pattern unit 22B can be reduced.
  • FIG. 18 is a schematic perspective view showing an enlarged main part of the lens device 1C as the fourth embodiment, and an enlarged part of the detection pattern portion 22C in the lens device 1C is enlarged as in FIG. Represents.
  • the focus operation ring 2fA is used as in the case of the third embodiment, and a ring-shaped member 16 that rotates integrally with the focus operation ring 2fA is provided on the inner peripheral side of the focus operation ring 2fA. .
  • the ring-shaped member 16 is made of, for example, a transparent material such as transparent resin, and the outer peripheral surface 16b is fixed to the inner peripheral surface 2fa of the focus operation ring 2fA.
  • the reflection carriers 15 are arranged along the rotation direction R at a predetermined interval.
  • the reflective carrier 15 is formed in a film shape on the inner peripheral surface 16a by, for example, printing. As described above, the inner surface of each of the reflection carriers 15 formed on the inner peripheral surface 16a of the ring-shaped member 16 functions as the reflection surface 20B.
  • the ring-shaped member 16 is transparent, the portion where the reflection carrier 15 is not arranged in the rotation direction R transmits light. That is, the light emitted from the light emitting element 10 can pass through the portion and reach the inner peripheral surface 2fa of the focus operation ring 2fA. At this time, the inner peripheral surface 2fa of the focus operation ring 2fA has a low light reflectance and functions as a non-reflecting surface 21B. Therefore, in the rotation direction R, the reflective surface 20B and the non-reflective surface 21B are alternately arranged.
  • the detection pattern portion 22C is a portion in which the reflection surface 20B formed on the inner surface of the reflection carrier 15 and the non-reflection surface 21B formed as a part of the inner peripheral surface 2fa are alternately arranged in the rotation direction R. It is configured as.
  • the ring-shaped member 16 may be discarded even if the pattern formation of the reflection carrier 15 fails. It is not necessary to discard 2fA, and the yield can be improved. Further, since the non-reflecting surface 21B is formed as a part of the inner peripheral surface 2fa, the focus operation ring 2fA can be formed of a general-purpose resin. Therefore, cost reduction can be achieved.
  • the reflective carrier 15 is formed on the inner peripheral surface 16a of the ring-shaped member 16, but this allows the reflective carrier 15 to be formed on the outer peripheral surface 16b of the ring-shaped member 16. It is also possible to reduce the amount of reflective carrier material used. Therefore, cost reduction can be achieved.
  • the reflection carrier 15 is formed on the inner peripheral surface 16 a of the ring-shaped member 16, the reflection carrier 15 can be easily formed on the ring-shaped member 16 by tampo printing (pad printing).
  • the reflective carrier 15 is formed on the transparent ring-shaped member 16 by printing or the like.
  • the reflective carrier 15 can also be formed as a part of the ring-shaped member 16.
  • the ring-shaped member 16 may be formed as a member in which metal portions and transparent portions are alternately positioned along the rotation direction R.
  • the ring-shaped member 16 is not necessarily required to be transparent as a whole, and at least the non-positioned portion of the reflection carrier 15 in the rotation direction R may be transparent.
  • the reflective carrier 15 can also be formed on the outer peripheral surface 16 b of the ring-shaped member 16. Further, when the reflective carrier 15 is formed on the inner peripheral surface 16a, a non-reflective carrier can be formed on the outer peripheral surface 16b. At this time, the non-reflective carrier can be formed only at a position corresponding to the non-arranged portion of the reflective carrier 15 in the rotation direction R, or over the entire circumference of the outer peripheral surface 16b. By forming the non-reflective carrier on the outer peripheral surface 16b, it is not necessary to lower the light reflectance of the inner peripheral surface 2fa, and the degree of freedom in selecting the material for the operation ring can be increased.
  • FIG. 19 is a schematic perspective view showing an enlarged main part of the lens apparatus 1D as the fifth embodiment, and an enlarged formation part of the detection pattern part 22D in the lens apparatus 1D as in FIG. Represents.
  • the positional relationship between the reflecting surface and the non-reflecting surface is reversed from that in the fourth embodiment.
  • the focus operation ring 2f is used as in the case of the first embodiment, the ring-shaped member 16 is provided on the inner peripheral side of the focus operation ring 2f, and the outer peripheral surface 16b of the ring-shaped member 16 is focused. It is fixed to the inner peripheral surface 2fa of the operation ring 2f.
  • the non-reflective carriers 7 are arranged along the rotation direction R on the inner peripheral surface 16a of the ring-shaped member 16 at a predetermined interval.
  • the non-reflective carrier 7 is formed in a film shape on the inner peripheral surface 16a by, for example, printing.
  • the inner surface of each non-reflective carrier 7 functions as a non-reflective surface 21C.
  • the inner peripheral surface 2fa of the focus operation ring 2f functions as the reflecting surface 20 as in the first embodiment. Therefore, in the rotation direction R, the reflective surface 20 and the non-reflective surface 21C are alternately arranged.
  • the detection pattern portion 22D is configured as a portion in which the reflection surface 20 and the non-reflection surface 21C are alternately arranged in the rotation direction R in this way.
  • the ring-shaped member 16 may be discarded even if the pattern formation of the non-reflective carrier 7 fails. It is not necessary to discard the operation ring 2f, and the yield can be improved. Further, since the non-reflective carrier 7 is formed on the inner peripheral surface 16 a of the ring-shaped member 16, the non-reflective carrier material is formed more than when the non-reflective carrier 7 is formed on the outer peripheral surface 16 b of the ring-shaped member 16. It is possible to reduce the amount used. Therefore, cost reduction can be achieved. Further, by forming the non-reflective carrier 7 on the inner peripheral surface 16a of the ring-shaped member 16, the non-reflective carrier 7 can be easily formed on the ring-shaped member 16 by tampo printing.
  • the non-reflective carrier 7 can also be formed as a part of the ring-shaped member 16. That is, also in the fifth embodiment, it is not essential that the ring-shaped member 16 is entirely transparent, and at least the non-positioned portion of the non-reflective carrier 7 in the rotation direction R only needs to be transparent.
  • the non-reflective carrier 7 may be formed on the outer peripheral surface 16 b of the ring-shaped member 16. Further, when the non-reflective carrier 7 is formed on the inner peripheral surface 16a, the reflective carrier can be formed on the outer peripheral surface 16b. At this time, the reflective carrier can be formed only at a position corresponding to the non-arranged portion of the non-reflective carrier 7 in the rotation direction R or over the entire circumference of the outer peripheral surface 16b. Thereby, it is not necessary to increase the light reflectance of the inner peripheral surface 2fa, and the degree of freedom in selecting the material for the operation ring can be increased. Particularly in this case, since a general-purpose resin material can be selected, cost reduction can be achieved.
  • each coordinate space has a value ⁇ of the A phase signal on the horizontal axis and a value ⁇ of the B phase signal on the vertical axis.
  • a Lissajous circle as shown in FIG. 20A is drawn.
  • the Lissajous circle is a perfect circle in an ideal state where the phase difference between the A phase signal and the B phase signal is 90 degrees.
  • FIG. 20B shows the waveforms of the A-phase signal and the B-phase signal whose phase difference is 90 degrees.
  • the current value coordinate p [t] moves in the counterclockwise direction on the Lissajous circle during forward rotation and moves in the clockwise direction on the Lissajous circle during reverse rotation (in FIG. 20A). See arrow).
  • the forward / reverse rotation is determined by determining which phase of the A-phase signal and the B-phase signal is relatively advanced.
  • FIG. 20A shows an example in which eight coordinates p′0 to p′7 are set as the reference coordinates p ′.
  • FIG. 20B shows the relationship between these reference coordinates p′0 to p′7 and the A-phase signal and B-phase signal.
  • the reference coordinate p′0 ( ⁇ 0, ⁇ 0) corresponds to a point in time when the value ⁇ of the A phase signal is the maximum value and the value ⁇ of the B phase signal is zero.
  • Whether or not the current value coordinate p [t] has passed the target reference coordinate p ′ among the reference coordinates p′0 to p′7 is, for example, an ⁇ value represented by the target reference coordinate p ′, ⁇
  • the determination is made based on the magnitude relationship between the value (for example, ⁇ 0, ⁇ 0 if the reference coordinate p′0) and the current value ⁇ , value ⁇ .
  • the reference coordinate p′3 is a target at the time of forward rotation, it is determined whether or not the condition “ ⁇ ⁇ ⁇ 3 and ⁇ ⁇ ⁇ 3” is satisfied for the current value ⁇ and value ⁇ .
  • the reference coordinate p′0 is the target during reverse rotation, it is determined whether or not the condition “ ⁇ ⁇ ⁇ 0 and ⁇ ⁇ ⁇ 0” is satisfied.
  • the rotation amount calculation based on the Lissajous circle can increase the detection resolution of the rotation amount as the number of reference coordinates p ′ set on the Lissajous circle is increased. Accordingly, the detection resolution can be improved as compared with the method of calculating the rotation amount based only on the zero-cross point of the A-phase signal and the B-phase signal (hereinafter referred to as “simple method”). For example, when eight reference coordinates p ′ are set as shown in FIG. 20A, the resolution can be improved to twice that of the simple method.
  • the rotation amount calculation method based on the Lissajous circle is a method for calculating the rotation amount using a plurality of reference coordinates set on the Lissajous circle as thresholds for the A-phase signal and the B-phase signal. At this time, by setting the number of reference coordinates p ′ to be at least 5 or more, it is possible to improve the rotation amount detection resolution as compared with the simple method.
  • the rotation amount calculation method based on the Lissajous circle is a method for calculating the rotation amount based on the A-phase signal, the B-phase signal, and a plurality of threshold values set for each of the A-phase signal and the B-phase signal. In other words.
  • the movement locus of the current value coordinates p [t] in the coordinate space shown in FIG. 20A does not draw a perfect circle. That is, the roundness decreases.
  • the rotation amount calculation based on the Lissajous circle when the roundness of the movement trajectory decreases, it is difficult to accurately determine the rotation amount, and it is difficult to increase the set number of reference threshold values p ′.
  • the movement locus of the current value coordinates p [t] approaches a perfect circle. For this reason, more reference threshold value p 'can be set, and the detection resolution of rotation amount can be improved.
  • threshold values Th1 to Th5 as shown in the figure are set as threshold values for the A phase signal and the B phase signal.
  • the threshold Th1 and the threshold Th5 are set to the values of the cross points of the A phase signal and the B phase signal immediately after the A phase signal reaches the maximum value and immediately after the minimum value, respectively, and the threshold Th3 is set to zero.
  • the threshold Th2 and the threshold Th4 are respectively set to an intermediate value between the threshold Th1 and the threshold Th3, and an intermediate value between the threshold Th5 and the threshold Th3.
  • the current value of the corresponding signal among the A-phase signal and the B-phase signal and the corresponding threshold Th are determined according to the order represented by the arrows (1) to (4) in the figure.
  • the comparisons will be made in order. Specifically, first, according to the arrow (1), for example, when the current value ⁇ [t] of the A-phase signal reaches the maximum value, whether or not the current value ⁇ [t] is less than or equal to the threshold Th1 is determined. judge. When the current value ⁇ [t] is equal to or less than the threshold value Th1, it is determined whether or not the current value ⁇ [t] is equal to or less than the threshold value Th2.
  • the current value ⁇ [t] is equal to or less than the threshold value Th2
  • the current value ⁇ [t] is equal to or less than the threshold value Th3. It is determined whether or not there is. Thereafter, when the current value ⁇ [t] becomes equal to or smaller than the threshold Th5, it is determined whether or not the current value ⁇ [t] of the B-phase signal is equal to or smaller than the threshold Th2 according to the arrow (2). In this way, whether or not the current value of the corresponding signal among the A-phase signal and the B-phase signal has passed through the corresponding point among the threshold points indicated by the black circles in the order indicated by the arrows (1) to (4). Are determined in order.
  • a certain value is added to the current value of the rotation amount. Accordingly, every time the rotation amount of the focus operation ring 2f increases by a certain amount, the value of the rotation amount changes by a certain value. That is, a value corresponding to the rotation amount of the focus operation ring 2f is calculated. In the cross-point method, the detection resolution of the rotation amount can be improved as the number of threshold values Th is increased.
  • a plurality of A-phase signals, B-phase signals, A-phase signals, and B-phase signals are set as in the rotation amount calculation method based on the Lissajous circle. In other words, the rotation amount is calculated based on the threshold value.
  • the lens device (1A, 1B, 1C, or 1D) as an embodiment includes an operation ring (2f or 2fA) that is rotated, a light emitting element (10) that emits light, and a plurality of light receiving elements ( 11, 12), and a reflective surface (20, 20A, or 20B) and a non-reflective surface (21, 21A, 21B, or 21C) that are alternately arranged in the rotation direction of the operation ring and move as the operation ring rotates.
  • a detection pattern portion (22, 22A, 22B, 22C, or 22D) is provided, the light emitting element emits light to the detection pattern portion, and the plurality of light receiving elements are disposed on the same substrate (13), The reflected light from the reflecting surface is received.
  • the positional relationship between the light receiving elements is determined with high accuracy, and the tolerance for narrowing the detection pattern by the reflecting surface and the non-reflecting surface is increased. Further, since the direct reading method is adopted, the cam ring used in the mechanical drive method can be omitted. Therefore, it is possible to improve the detection resolution with respect to the amount of rotation of the operation ring while suppressing an increase in the size of the lens device.
  • the cam ring can be omitted for the mechanical drive system, the lens device can be miniaturized and the optical element to be operated can be moved at high speed.
  • the speed increasing method has an advantage that the above-described hysteresis problem can be solved, and further, even when applied to a retractable lens device, the enlargement can be suppressed.
  • the plurality of light receiving elements are arranged such that the light receiving surfaces face the reflecting surfaces.
  • the reflected light is efficiently received by the light receiving element. Therefore, the detection accuracy of the rotation amount and the rotation direction of the operation ring can be improved.
  • the first light receiving element and the second light receiving element are provided as the light receiving elements. It is located between the light receiving surface center of one light receiving element and the light receiving surface center of the second light receiving element.
  • the number of light emitting elements to be provided is one when each of the two light receiving elements receives the reflected light from the reflecting surface. Therefore, the number of parts can be easily reduced.
  • At least a part of the first light receiving element and at least a part of the second light receiving element are located within the arrangement range of the light emitting elements in the arrangement direction.
  • the separation distance between the two light receiving elements in the alignment direction is shortened. Accordingly, the size of the detection unit composed of at least two light receiving elements and the light emitting elements can be reduced in size.
  • all of the first light receiving elements and all of the second light receiving elements are positioned within the arrangement range of the light emitting elements in the arrangement direction.
  • the separation distance between the two light receiving elements in the alignment direction is further shortened. Therefore, the size can be further reduced in the direction in which the detection units composed of at least two light receiving elements and light emitting elements are arranged.
  • At least a part of the first light receiving element and at least a part of the second light receiving element in the arrangement range of the light emitting elements in the pattern orthogonal direction that is the axial direction of the rotation axis of the operation ring. Is located.
  • all of the first light receiving elements and all of the second light receiving elements are located within the arrangement range of the light emitting elements in the pattern orthogonal direction.
  • the separation distance between the two light receiving elements in the pattern orthogonal direction is further shortened. Therefore, the size of the detection unit composed of at least two light receiving elements and light emitting elements can be further reduced in the pattern orthogonal direction.
  • the widths of the reflecting surface and the non-reflecting surface in the direction in which the reflecting surface and the non-reflecting surface are arranged are each 0.3 mm or less.
  • the reflective surface is formed as a part of the inner peripheral surface of the operation ring
  • the non-reflective surface is a non-reflective carrier (7 or 7A) formed on the inner peripheral surface of the operation ring. ) (See the first embodiment or the second embodiment).
  • the reflective surface is formed as a part of the inner peripheral surface of the operation ring made of metal, or the inner peripheral surface of the metal-plated operation ring, for example. This makes it possible to increase the deterrence against damage or breakage of the reflective surface over time as compared with the case where the reflective surface is formed by printing. Accordingly, it is possible to suppress a decrease in detection accuracy over time with respect to the rotation amount and rotation direction of the operation ring.
  • the non-reflective carrier is formed in a film shape.
  • the protrusion amount of the non-reflective carrier is suppressed, and the space to be secured between the light receiving element and the light emitting element and the detection pattern portion can be reduced. Accordingly, the size of the lens device can be reduced in the radial direction.
  • the non-reflective carrier is a protrusion protruding in the inner peripheral direction of the operation ring.
  • the non-reflective surface is formed as a part of the inner peripheral surface of the operation ring
  • the reflective surface is the inner surface of the reflection carrier (15) formed on the inner peripheral surface of the operation ring.
  • the operation ring By forming the non-reflective surface as a part of the inner peripheral surface of the operation ring, the operation ring can be formed of a general-purpose resin. Therefore, cost reduction can be achieved.
  • the reflective carrier is formed in a film shape.
  • the protrusion amount of the reflective carrier is suppressed, and the space to be secured between the light receiving element and the light emitting element and the detection pattern portion can be reduced. Accordingly, the size of the lens device can be reduced in the radial direction.
  • a ring-shaped member (16) that rotates integrally with the operation ring is provided on the inner peripheral side of the operation ring, and the non-reflecting surface is formed as a part of the inner peripheral surface of the operation ring.
  • the reflection surface is formed as an inner surface of the reflection carrier positioned at a predetermined interval in the rotation direction in the ring-shaped member, and the ring-shaped member is transparent at least at a non-position portion of the reflection carrier in the rotation direction (first position). See four embodiments).
  • the operation ring can be formed of a general-purpose resin. Therefore, cost reduction can be achieved.
  • the reflective carrier is formed on the inner peripheral surface of the ring-shaped member.
  • the amount of the reflective carrier material used can be reduced as compared with the case where the reflective carrier is formed on the outer peripheral surface of the ring-shaped member. Therefore, cost reduction can be achieved. Further, by forming the reflection carrier on the inner peripheral surface of the ring-shaped member, it becomes easy to form the reflection carrier on the ring-shaped member by tampo printing.
  • a ring-shaped member that rotates integrally with the operation ring is provided on the inner peripheral side of the operation ring, and the reflective surface is formed as a part of the inner peripheral surface of the operation ring and is non-reflective.
  • the surface is formed as an inner surface of a non-reflective carrier positioned at a predetermined interval in the rotation direction in the ring-shaped member, and at least a non-position portion of the non-reflective carrier in the rotation direction is transparent (fifth). See embodiment).
  • the ring-shaped member may be discarded, the operation ring is not discarded, and the yield can be improved.
  • the reflecting surface is formed as a part of the inner peripheral surface of the operation ring, the reflecting surface is a part of the inner peripheral surface of the operation ring made of metal or the inner surface of the operation ring plated with metal, for example.
  • the reflective surface is formed by printing, it is possible to increase the deterrence against damage and breakage of the reflective surface over time. Accordingly, it is possible to suppress a decrease in detection accuracy over time with respect to the rotation amount and rotation direction of the operation ring.
  • the non-reflective carrier is formed on the inner peripheral surface of the ring-shaped member.
  • the non-reflective carrier material used As compared with the case where the non-reflective carrier is formed on the outer peripheral surface of the ring-shaped member. Therefore, cost reduction can be achieved. Further, by forming the non-reflective carrier on the inner peripheral surface of the ring-shaped member, it becomes easy to form the non-reflective carrier on the ring-shaped member by tampo printing.
  • the first light receiving element and the second light receiving element are provided as the light receiving elements, the first light receiving signal that is the light receiving signal of the first light receiving element, and the second light receiving element.
  • An arithmetic circuit (53) is provided that calculates the amount of rotation of the operation ring based on a second light reception signal that is a light reception signal and a plurality of threshold values set for each of the first light reception signal and the second light reception signal. .
  • the rotation amount is calculated based on a plurality of points in the waveforms of the first light receiving signal and the second light receiving signal. Accordingly, it is possible to improve the detection resolution of the rotation amount as compared with the case where the rotation amount is calculated based only on the zero cross point of the first light reception signal and the second light reception signal.
  • the arithmetic circuit calculates the rotation amount using a plurality of reference coordinates set on the Lissajous circle as threshold values for the first light receiving signal and the second light receiving signal.
  • the rotation amount calculation based on the Lissajous circle is performed while the positional accuracy of the two light receiving elements is high. Therefore, it is possible to improve the detection resolution of the rotation amount.
  • the present technology is not limited to the specific examples described above, and can take various configurations.
  • an example is given in which the present technology is applied to an optical element driving system for focus adjustment, but the present technology is also suitably applied to other applications such as an optical element driving system for zoom adjustment. it can.
  • the lens device according to the present technology may take a form integrated with a camera main body having an imaging element or the like.
  • the calculation method of the rotation amount is not limited to the method exemplified above, and other methods can be adopted.
  • this technique can also take the following structures.
  • a rotating operation ring A light emitting element that emits light;
  • a plurality of light receiving elements A detection pattern portion having a reflective surface and a non-reflective surface that are alternately arranged in the rotation direction of the operation ring and moves with the rotation of the operation ring is provided,
  • the light emitting element emits light to the detection pattern portion,
  • the plurality of light receiving elements are arranged on the same substrate and receive reflected light from the reflecting surface.
  • At least a part of the first light receiving element and at least a part of the second light receiving element are located within an arrangement range of the light emitting elements in a pattern orthogonal direction that is an axial direction of the rotation axis of the operation ring.
  • the lens device according to any one of (1) to (8), wherein widths of the reflective surface and the non-reflective surface in an arrangement direction in which the reflective surface and the non-reflective surface are arranged are each 0.3 mm or less. .
  • the reflective surface is formed as a part of the inner peripheral surface of the operation ring
  • the lens device according to any one of (1) to (9), wherein the non-reflective surface is formed as an inner surface of a non-reflective carrier formed on an inner peripheral surface of the operation ring.
  • the non-reflective carrier is formed in a film shape.
  • the non-reflective surface is formed as a part of the inner peripheral surface of the operation ring.
  • the reflective carrier is formed in a film shape.
  • a ring-shaped member that rotates integrally with the operation ring on the inner peripheral side of the operation ring;
  • the non-reflective surface is formed as a part of the inner peripheral surface of the operation ring,
  • the reflection surface is formed as an inner surface of a reflection carrier positioned at a predetermined interval in the rotation direction in the ring-shaped member,
  • the lens device according to any one of (1) to (9), wherein the ring-shaped member is transparent at least at a non-position portion of the reflective carrier in the rotation direction.
  • the reflective carrier is formed on an inner peripheral surface of the ring-shaped member.
  • a ring-shaped member that rotates integrally with the operation ring on the inner peripheral side of the operation ring;
  • the reflection surface is formed as a part of the inner peripheral surface of the operation ring
  • the non-reflective surface is formed as an inner surface of a non-reflective carrier positioned at a predetermined interval in the rotation direction in the ring-shaped member,
  • the lens device according to any one of (1) to (9), wherein the ring-shaped member is transparent at least in a non-position portion of the non-reflective carrier in the rotation direction.
  • the non-reflective carrier is formed on an inner peripheral surface of the ring-shaped member.
  • the first light receiving element and the second light receiving element as the light receiving element, A plurality of settings are made for each of the first light receiving signal that is the light receiving signal of the first light receiving element, the second light receiving signal that is the light receiving signal of the second light receiving element, and each of the first light receiving signal and the second light receiving signal.

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  • General Physics & Mathematics (AREA)
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Abstract

La présente invention permet d'améliorer la résolution de détection pour la quantité de rotation d'un anneau d'actionnement tout en supprimant l'augmentation de taille d'un dispositif de lentille. Un dispositif de lentille selon la présente invention comprend un anneau d'actionnement devant être actionné par rotation, un élément électroluminescent pour émettre de la lumière, et une pluralité d'éléments de réception de lumière, et est pourvu d'une partie de motif de détection comprenant une surface réfléchissante et une surface non réfléchissante qui sont disposées en alternance dans la direction de rotation de la bague d'actionnement et se déplacent avec la rotation de la bague d'actionnement. L'élément électroluminescent émet de la lumière sur la partie de motif de détection La pluralité d'éléments récepteurs de lumière sont disposés sur le même substrat et reçoivent la lumière réfléchie par la surface réfléchissante.
PCT/JP2017/027077 2016-09-13 2017-07-26 Dispositif lentille WO2018051645A1 (fr)

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JP2018539551A JP6973398B2 (ja) 2016-09-13 2017-07-26 レンズ装置

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WO2023243604A1 (fr) * 2022-06-17 2023-12-21 富士フイルム株式会社 Anneau d'actionnement et dispositif de lentille, et procédé de fabrication d'anneau d'actionnement
WO2024043152A1 (fr) * 2022-08-22 2024-02-29 富士フイルム株式会社 Anneau de fonctionnement, dispositif de lentille et procédé de production d'anneau de fonctionnement

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CN113259575A (zh) * 2021-06-18 2021-08-13 深圳术为科技有限公司 摄像头镜头

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