JP2011045673A - Optometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optometer which visualizes information on the degree etc., of an optical element displayed on a device, even within a dark room. <P>SOLUTION: The optometer has a pair of right and left inspection units having optical elements disposed in a casing. Using an operation part provided in the casing, a desired optical element is switch-disposed at the inspection window of the casing to perform self-conscious inspection of the refractive power etc., of a subject eye. The optometer is provided with: a first information display part which is provided outside of the casing in order to obtain the information on the optical element disposed at the inspection window by the operation part and which has a luminous paint which performs excited light emission with light applied thereon; a second information display part which is provided within the casing in order to obtain the information on the optical element disposed at the inspection window by the operation part and which has a luminous paint which performs excited light emission with light applied thereon; and a light guide part which guides light to a second information display part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optometry apparatus that subjectively examines (measures) the refractive power of a subject's eye.

  Optical elements such as spherical lenses and columnar surfaces (astigmatism) lenses are manually switched and arranged in front of the subject's eyes, and the target is shown to the subject's eyes through the arranged optical elements. There are known optometry devices called refractors and phoropters that subjectively examine (measure) the refractive power of the subject's eyes. Examination using such a subjective optometry apparatus is often performed in a dark room, and in order for the examiner to visually recognize information such as the frequency of the optical element displayed on the apparatus, it is illuminated with a penlight or the like. There must be. In recent years, in order to eliminate such annoyance, an apparatus having a function of illuminating displayed optical element information has been provided, and optical element information is illuminated from the inside by a light source incorporated in the apparatus. (For example, refer to Patent Document 1).

US Patent No. 5281984

  However, when the optical element information is illuminated using a light source such as a lamp or LED, the optical element information can be easily visually recognized, but the dark room becomes bright. Further, since the optical element information is not provided in one place, if it is intended to illuminate all of them, the manufacturing cost increases.

  In view of the above-described problems of the prior art, it is an object of the present invention to provide an optometry apparatus that enables information such as the frequency of an optical element displayed on the apparatus to be visually recognized in a dark room with a simple configuration.

The present invention is characterized by having the following configuration in order to solve the above-mentioned problems.
(1) It has a pair of left and right inspection units in which an optical element is disposed in a housing, and a desired optical element is switched to an inspection window of the housing by using an operation unit provided in the housing. In an optometry apparatus that subjectively examines the refractive power of a subject's eye, the operation unit is provided outside the casing to obtain information on the optical element disposed in the examination window and is excited and emitted by light. A first information display unit coated with a phosphorescent paint, and a phosphorescent paint that is provided in the casing to obtain information on the optical element disposed in the inspection window by the operation unit and is excited and emitted by light. The second information display unit and a light guide unit that guides light to the second information display unit.
(2) In the optometry apparatus according to (1), the light guide unit includes a daylighting unit provided on an upper portion of the housing for capturing light.
(3) In the optometry apparatus according to (2), the second information display unit is a disk on which information on the optical element is written, and the light guide unit is connected to the daylighting unit and covers the disk It is characterized by providing a part.
(4) In the optometry apparatus according to (3), the light guide section includes a diffusion section that diffuses the light guided into the covering section.
(5) In the optometry apparatus according to (4), the light guide section includes a reflection section that reflects light guided into the cover section and light diffused in the cover section toward the disk side. And
(6) In the optometry apparatus according to (1), the light guide part is a light-transmitting window having translucency formed in the housing so as to cover the second information display part.
It is characterized by that.

  According to the present invention, it is possible to make information such as the frequency of the optical element displayed on the apparatus visible in a dark room with a simple configuration.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic external view of a subjective optometry apparatus according to the present embodiment as viewed from the examiner side.

  The optometric apparatus main body 1 includes a pair of left-right symmetric inspection units 10L and 10R, and a right-eye inspection unit 10R, and a support unit 2 that suspends and supports the inspection units 10L and 10R. Each of the inspection units 10L and 10R is provided with an inspection window 11, and various optical elements are switched and arranged. A transparent protective member for preventing dust and the like from entering the inspection units 10L and 10R is disposed on the examiner side and the subject side of the inspection window 11.

  Inside each of the inspection units 10L and 10R, a plurality of lens disks each having a plurality of various optical elements such as a spherical lens, a columnar surface (astigmatism) lens, and an auxiliary lens are arranged. Each lens disk has a spherical power conversion knob (dial) 13, an auxiliary lens conversion knob (dial) 14 provided on the outer surface of each of the inspection units 10L and 10R via a drive mechanism such as a gear, It is connected to operation sections such as a column surface (astigmatism) power conversion knob (dial) 15 and a column surface (astigmatism) axis angle conversion knob (dial) 16. Then, when the knobs 13, 14, 15, etc. are operated (turned), the lens disk is rotated, and a desired optical element is arranged in the inspection window 11. Further, when the knob 16 is operated (turned), the columnar lens is rotated with respect to the lens disk, and the columnar axis angle is changed.

  Around the knob 14 is provided an information display section (indicator) 14a composed of characters, symbols, and the like for indicating the type of the auxiliary lens arranged in the inspection window 11. In addition, an information display unit (indicator) 16 a including characters, scales, and the like for indicating the column surface axis angle of the column lens disposed in the inspection window 11 is provided around the knob 16. In addition, an information display unit (indicator) 12 including characters, scales, and the like for indicating the column surface axis angle of the columnar lens disposed in the inspection window 11 is also provided around the inspection window 11.

  On the outer surface of each of the inspection units 10L and 10R on the examiner side, an information display unit (indicator) 17 including characters, symbols, and the like for indicating the spherical power of the spherical lens disposed in the inspection window 11, and the inspection window 11 And an information display unit (indicator) 18 composed of characters, symbols, and the like for indicating the column surface frequency of the columnar lens disposed in.

  As shown in FIG. 2A, in the inspection units 10L and 10R, the spherical power of the spherical lens disposed in the inspection window 11 that rotates in conjunction with the rotation of the lens disk in which the spherical lens is disposed is obtained. A spherical power display disk 30 for displaying the indicated characters on the information display unit 17 is disposed. Similarly, in the inspection units 10L and 10R, characters or the like indicating the column surface frequency of the column surface lens disposed in the inspection window 11 that rotates in conjunction with the rotation of the lens disk on which the column surface lens is disposed. A column surface (astigmatism) frequency display disk 35 for display on the information display unit 18 is arranged. In each of the disks 30 and 35, characters and the like are printed (printed) on one surface (display surface). Further, in the disk 30 of this embodiment, two disks are used in order to display a wide range of spherical powers (details will be described later). A light guide 40 is provided around the disks 30 and 35 so as to cover them (details will be described later).

  A turret 20 is provided on the outer surface of the examiner side of each of the inspection units 10L and 10R, and a rotary prism 21 and a cross cylinder lens 22 are disposed on the turret 20 via a holding member. Switching to the window 11 is possible. Each of the rotary prism 21 and the cross cylinder lens 22 is rotatably arranged on the turret 20 via a holding member. The holding member of the rotary prism 21 is provided with an information display unit (indicator) 21 a for indicating the arrangement (rotation) state of the rotary prism 21. The holding member of the cross cylinder lens 22 is provided with an information display section (indicator) 22a for indicating the arrangement (rotation) state of the cross cylinder lens 22.

  In addition, an information display unit (indicator) 23 for indicating a distance (distance between pupils (PD)) between the examination windows 11 of the examination units 10L and 10R is provided on the outer surface of the support unit 2 on the examiner side. . The information display unit 23 indicates the distance between the inspection unit 10L and the inspection unit 10R (that is, the distance between the inspection windows 11) that is changed by operating the PD adjustment knob 51.

  A lighting window (opening) 19 for taking light into the inspection units 10L and 10R is provided above the inspection units 10L and 10R. The daylighting window 19 is provided so as to face an indoor lamp located above the inspection units 10L and 10R in order to efficiently capture light.

  In the present embodiment, the information display unit for displaying information such as the frequency of the optical element is made to be visible to the examiner even when inspecting in the dark room using a phosphorescent paint that accumulates light and emits light (excitation light emission). ing. Such an information display unit includes a first information display unit that is exposed outside the casing of the inspection units 10L and 10R, and a second information display unit that is provided so that light does not directly strike the casing. It is roughly divided into As the first information display section, information display sections 12, 14a, 16a, 21a, 22a and 23, portions (characters etc.) displayed (exposed) on the information display sections 17 and 18 of the disks 30 and 35, It is. The second information display portion is a portion (characters or the like) that is not displayed (exposed) on the information display portions 17 and 18 of the disks 30 and 35.

  The information display unit is base-printed (applied) with a white-based phosphorescent paint under visible light, and characters and the like are printed in black on the phosphorescent paint. On the sphericity display disk 30, characters indicating a minus (−) spheric power are printed with a phosphorescent paint that emits red light.

  The phosphorescent paint used in the present embodiment has a characteristic of emitting light in a dark place by being excited by ultraviolet light of indoor light such as a fluorescent lamp or light from outdoor light. As such a phosphorescent paint, it is preferable to use a paint having a property of emitting light for about 8 to 10 hours in a dark place by receiving room light for about 10 to 30 minutes. In addition, as a phosphorescent paint, N nightlight (Luminova (trademark)) of Nemoto Special Chemical Co., Ltd. is used, for example.

  Next, a configuration for storing light in the phosphorescent paint on the display surfaces of the disks 30 and 35 will be described. FIG. 2A is a front view of the discs 30 and 35 and the light guide 40 viewed from the examiner side, and FIG. 2B is an enlarged front view of the disc 30 and FIG. These are typical sectional drawing of the disc 30 and the light guide part 40 in the dotted line A of Fig.2 (a). In FIG. 2A, the reflection portion 44 is not shown for the sake of simplicity. The disk 30 is rotatably held by pins 38, and the disk 35 is rotatably held by pins 39. In FIG. 2C, the light guide 40 and a part of the disk 30 are cut by a circular arc (dotted line A) with the pin 38 as the center.

  A light guide unit 40 is provided inside the inspection units 10L and 10R. The light guide unit 40 has a role of guiding light to the display surfaces of the disks 30 and 35, a daylighting unit 41 that takes in light, a covering unit 42 that is connected to the daylighting unit 41 and surrounds the disks 30 and 35, A diffusion part 43 for diffusing the light guided in the covering part 42, and a reflecting part for reflecting the light guided in the covering part 42 and the light diffused in the covering part 42 toward the disks 30 and 35 44. In the light guide section 40 (cover section 42), an opening (lighting window) 45a is formed at the position of the information display section 17, and an opening (lighting window) 45b is formed at the position of the information display section 18. Is formed. In addition, the light guide part 40 of this embodiment is integrally formed by the flat plate with the characteristic which permeate | transmits the light (ultraviolet ray) stored in the phosphorescent paint, As the material, it is transparent, such as an acryl and a polycarbonate. A transparent member such as a resin or glass is used. In addition, the coating | coated part 42 should just be a shape which covers the 2nd information display surface (character etc.) of the discs 30 and 35 at least.

  The end of the daylighting unit 41 is located in the daylighting window 19 and its end surface is polished to efficiently capture light. As shown in FIG. 2 (c), the diffusing unit 43 is formed by a large number of wedge-shaped grooves, and the height (depth) of the wedge gradually increases as the distance from the daylighting unit 41 increases. Thereby, light can be efficiently diffused even at a location where the amount of light guided away from the daylighting unit 41 becomes small, and light can be guided substantially uniformly to the display surfaces of the disks 30 and 35. For example, when light is guided from the direction indicated by the arrow in the figure, the room light is guided substantially uniformly to the disk 30 side. Note that the diffusing portion 43 may be configured to diffuse light passing through the covering portion 42, and may be a number of holes orthogonal to the covering portion 42. Moreover, the diffusion part 43 should just be formed so that the 2nd information display part of the discs 30 and 35 may be covered at least. The reflecting portion 44 is formed of a white resin with low translucency, a metal having a mirror surface, or the like in order to reflect light.

  In the present embodiment, the disc 30 is a combination of two discs in order to display a wide range of spherical power without increasing the diameter. That is, in order to display characters and the like indicating the spherical power of the spherical lens arranged in the inspection window 11 on the information display unit 17, as shown in FIG. 2B, the front disk 31 having a slit (opening) 31b and A rear disk 32 disposed on the rear side of the disk 31 is disposed. The disk 31 and the disk 32 are held coaxially and rotatable. A character 31 a is printed near the slit 31 b on the disk 31, and a character 32 a is printed on a portion corresponding to the slit 31 b on the disk 32. The character 31a indicates the frequency of the higher rank, and the character 32a indicates the frequency of the lower rank. The characters 31a and the slits 31b are printed (printed) and formed on portions corresponding to the openings 45a on the disk 31.

  The disk 30 has a light guide 33 for guiding light to the disk 32. The light guide 33 is provided between the disk 31 and the disk 32. In the present embodiment, the light guide plate fixed to the back surface of the disk 31 is the light guide portion 33. The light guide 33 is a flat plate having the same diameter as that of the disk 31 and is formed of a resin having translucency. Also. The light guide unit 33 includes a daylighting unit 33a and a diffusion unit 33b. The daylighting unit 33a is formed in a portion corresponding to the slit 31b. The diffusion portion 33a is formed with a groove for diffusing light. For this reason, light is guided substantially uniformly to the disk 32 through the slit 31b and the daylighting unit 33a, and can be stored in the phosphorescent paint of the character 32a.

  The operation of the optometry apparatus having the above configuration will be briefly described. When a room lamp such as a fluorescent lamp that has been turned on is turned off, the information display unit of the optometry apparatus main body 1 emits light. That is, since the phosphorescent paint printed (applied) on the information display sections such as the information display sections 12, 14a, 16a, 17, 18, 21a, 22a, 23, etc. emits light in a predetermined color, A person can easily visually recognize the information display section even in a dark room. Since the light emitted from the phosphorescent paint is soft light, it is not brighter than necessary, and there is no risk of disturbing the darkroom inspection.

  The examiner uses a not-shown optotype presenting apparatus to present a predetermined optotype in front of the subject's eye, and while viewing the information display unit, the knobs 13, 14, 15, , Etc. are operated to arrange the optical element in the examination window 11 and examine the eye of the subject.

  As described above, by performing base printing of the white fluorescent paint on the information display unit under visible light, the phosphorescent paint is not conspicuous in a place other than the dark room (bright examination room), and characters and the like can be easily read. Note that phosphorescent paint may be used for characters and the like. In such a case, the color of the phosphorescent paint under visible light may be appropriately selected so that characters and the like can be easily read outside the dark room.

  As described above, information such as the frequency of the optical element displayed on the apparatus can be made visible in a dark room with a simple configuration.

  In the above embodiment, the light guide unit 40 is provided in the casings of the inspection units 10L and 10R. However, the reflection surface is provided on the inner surface of the casing, and the light from the lighting window is supplied to the disks 30 and 35. It is good also as a structure which guides light.

  In the above embodiment, the light guide unit 40 is provided in the casings of the inspection units 10L and 10R. However, a lighting window (light guide unit) is provided on the examiner side of the casing. It may be a configuration. For example, a window having translucency may be provided in a portion corresponding to the display surface of the disks 30 and 35. Accordingly, light can be guided not only to the portion displayed (exposed) on the information display portions 17 and 18 but also to the portion not displayed (exposed) to the information display portions 17 and 18. In addition, it is preferable that the window has a slit surface so that characters in the housing cannot be seen by the examiner.

  In the above embodiments, the light guide unit guides light to the information display units in the casings of the inspection units 10L and 10R and stores the light in the phosphorescent paint. The structure which arrange | positions and makes it accumulate | store in a phosphorescent paint may be sufficient. For example, a light emitting element may be disposed in the housing so as to irradiate light to the light guide, or the light emitting element may be disposed in the housing so as to directly irradiate the disks 30 and 35 without using the light guide. May be arranged. The power source of the light emitting element may be a battery, a solar cell, or the like disposed in or on the casing, or may be an external AC power source using a cable. When a battery is used as the power source of the light emitting element, the cable is not wired inside the casing, and the cable does not come into contact with the operating unit in the optometry apparatus and is disconnected. Further, even when a solar cell or an external power source is used as the power source of the light emitting element, the use of the light guide unit facilitates wiring so that the cable does not contact the operating unit in the optometry apparatus. Moreover, you may use the optical sensor which detects the light quantity in a room for lighting control of a light emitting element. For example, using a light sensor, the light emitting element is turned on when the room is bright and turned off when the room is dark. Thereby, the power consumption of the apparatus can be suppressed.

It is the schematic external view which looked at the subjective optometry apparatus which is this embodiment from the examiner side. It is a figure which shows a spherical power display disk, a column surface power display disk, and a light guide part.

DESCRIPTION OF SYMBOLS 1 Optometry apparatus main body 10L Inspection unit 10R Inspection unit 11 Inspection window 12 Information display part 13 Spherical power conversion knob 14 Auxiliary lens conversion knob 14a Information display part 15 Column surface frequency conversion knob 16 Column surface axis angle conversion knob 16a Information Display unit 17 Information display unit 18 Information display unit 19 Daylighting window 30 Spherical power display disk 35 Column surface power display disk 40 Light guide unit

Claims (6)

A pair of left and right inspection units in which optical elements are arranged in a casing, and a desired optical element is switched and arranged in the inspection window of the casing by using an operation unit provided in the casing. In an optometry apparatus that subjectively examines the refractive power of the eye,
A first information display unit provided outside the housing for obtaining information of the optical element disposed in the inspection window by the operation unit, and applied with a phosphorescent paint that is excited and emitted by light;
A second information display unit provided in the casing for obtaining information of the optical element disposed in the inspection window by the operation unit, and applied with a phosphorescent paint that is excited and emitted by light;
A light guide for guiding light to the second information display;
An optometry apparatus characterized by comprising: The optometry apparatus of claim 1,
The light guide unit includes a daylighting unit provided on an upper portion of the housing for capturing light.
An optometry apparatus characterized by that. The optometry apparatus of claim 2,
The second information display unit is a disc on which information of the optical element is written,
The light guide unit includes a covering unit that is connected to the daylighting unit and covers the disk.
An optometry apparatus characterized by that. The optometry apparatus of claim 3,
The light guide part has a diffusion part for diffusing the light guided into the covering part,
An optometry apparatus characterized by that. The optometry apparatus of claim 4,
The light guide unit includes a reflection unit that reflects light guided in the cover unit and light diffused in the cover unit to the disk side,
An optometry apparatus characterized by that. The optometry apparatus according to claim 1, wherein the light guide unit is a daylighting window having translucency formed in the housing so as to cover the second information display unit.
An optometry apparatus characterized by that.

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