EP0647331A1 - Lunettes de protection contre la lumiere - Google Patents

Lunettes de protection contre la lumiere

Info

Publication number
EP0647331A1
EP0647331A1 EP93914718A EP93914718A EP0647331A1 EP 0647331 A1 EP0647331 A1 EP 0647331A1 EP 93914718 A EP93914718 A EP 93914718A EP 93914718 A EP93914718 A EP 93914718A EP 0647331 A1 EP0647331 A1 EP 0647331A1
Authority
EP
European Patent Office
Prior art keywords
light protection
rotatable
polarization
glasses
filter disks
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP93914718A
Other languages
German (de)
English (en)
Inventor
Michael G. May
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCI MERCIMMO
Original Assignee
SCI MERCIMMO
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 SCI MERCIMMO filed Critical SCI MERCIMMO
Publication of EP0647331A1 publication Critical patent/EP0647331A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/12—Polarisers

Definitions

  • the present invention relates to light protection glasses with adjustable darkening, in which a pair of rotatable polarization filters is arranged in front of each eye in a spectacle part, the rotatable filter disks being rotatable together by means of rotating means.
  • An air-filled dead space is located between the individual polarization filters of each pair of the known glasses, which therefore consists of two panes arranged one behind the other. As a result of temperature fluctuations in use, this air exchanges at least partially with the outside air. As a result, a condensation of moisture which has been carried in forms, as is known from double windows, except for those which are hermetically sealed. Since at least one disk of the polarization filter has to twist against the other, such a hermetic seal cannot be achieved. The finest dust can also enter the dead space mentioned.
  • FIG. 1 is a front view of light protection glasses according to the invention
  • FIG. 1 shows the top view of the glasses according to FIG. 1,
  • FIG. 3 shows the rear view of the glasses of FIG. 1,
  • FIG. 4 shows a cross section of the glasses frame according to FIG. 1 in the plane IV-IV (FIG. 1) with polarization filters in an enlarged view
  • FIG. 5 shows a cross section as in Fig. 4, but of another frame
  • FIG. 7 is an enlarged, partially sectioned view of part of the light protection glasses according to FIG. 1, 8 shows a section in the plane YY in FIG. 7,
  • FIG. 9A shows a detail of another embodiment of the glasses in the illustration according to FIG. 7,
  • Fig. 9B shows a section in the plane Y-Y in Fig. 9A.
  • FIG. 10A shows another embodiment of the filter adjustment in the illustration according to FIG. 7,
  • FIG. 10B shows a section in the plane X-X in Fig. 10A
  • FIG. 11 shows an embodiment modified from FIG. 4 for storing and sealing the rotatable filter disks in the illustration according to FIG. 4,
  • FIG. 12 shows a variant of the embodiment according to FIG. 11,
  • FIG. 13 shows an embodiment modified from FIG. 5 for storing and sealing the rotatable filter disks in the illustration according to FIG. 5,
  • FIGS. 13 and 14 show the storage of the rotatable filter disk in the embodiment according to FIGS. 13 and 14,
  • Fig. 17 is the front view of a preferred embodiment
  • FIG. 18 shows a section in the plane AA in FIG. 17 on an enlarged scale.
  • several parts are identical in pairs, sometimes also mirror images. They are then given the same reference numerals, one of which is given an apostrophe (').
  • a spectacle frame 2 has, in a manner known per se, two frames 82, 82 ', each with a circular opening for receiving round viewing panes.
  • the frames 82, 82 ' are connected by an upper web 81 and a lower web 80, which is shaped to put the glasses on the nose.
  • Brackets 4, 4 ' are articulated to the frame in a known manner.
  • the straight part of the upper web 81 is designed as a profile 48 (see also FIG. 8), in which a groove 49 is provided, preferably on the back of the light protection glasses.
  • An actuator 47 is slidably arranged on the profile 48.
  • a sliding, pulling and bending element 46, 46 ' (one element for each side of the glasses) is slidably mounted and guided in this groove 49 with little play and is in operative connection with a rotatably arranged polarization filter.
  • a fixed polarization filter disk 6, 6' is inserted tightly and firmly in a corresponding recess, for example by gluing.
  • a rotatably mounted polarization filter disc 5, 5 ' which is axially supported on the one hand on a dust and water-tight sealing lip 50, 50' or a shoulder 51, 51 'of the frame 82, 82' , the contact pressure on this lip or shoulder either by a wave-shaped, theoretically averaged
  • the flat surface of the spacer ring 52, 52 ' which is slightly corrugated and designed as a snap ring, or by direct contact with the fixed disk 6, 6' is constructed.
  • the filter disks 6, 6 ' are at a distance from the filter disks 5, 5' given by the thickness of the spacer ring 52, 52 ', as a result of which a cavity 99 is formed.
  • the two disks 5, 5 'and 6, 6' slide on one another without a gap, that is to say without formation of dead space.
  • Each disk of a pair of filters is preferably provided on both sides with a light-polarizing layer and at least one scratch-resistant protective layer located thereover.
  • These layers are not shown in the drawing, but are known per se. The material of these layers should be self-lubricating so that the two disks cannot seize together.
  • individual, optical correction glasses 42, 42 ' can be provided and installed as required, which can be glued or shrunk into the frame 82, 82' or attached in some other way.
  • the above-mentioned member 46 slides through a seal 70, 70 'installed in the spectacle frame 2, which also exerts a wiping effect.
  • the dead space inside the spectacle frame 2 is made air-free, ie between the polarizing filter disks and in the space of the rotation means and their connections to the disks etc., in such a way that no air exchange with the surrounding atmosphere is more possible or is restricted to an absolute minimum.
  • This is achieved in the simplest way by filling the dead space with a transparent medium that is used at the temperatures of the glasses neither crystallize nor evaporate nor change in any other way and of course must also be lightfast.
  • the medium should also have sliding properties.
  • water-soluble liquids such as glycerol, glycols, their esters and some ethers, and on the other hand those whose refractive index matches that of the material of the polarization filter disks (acrylic glass approx. 1.47 to 1.50).
  • Certain silicone oils, silicone greases and other fats can also be considered, for example polyglycol ether with a waxy texture.
  • the medium of choice is glycerin. Special effects can be achieved by means of phototropic media or additives.
  • the medium mentioned fills the entire dead spaces, which are formed by the spaces between the polarization filter disks, the rear seal and the cutouts for the sliding element.
  • the medium can be introduced through a blind bore 71, 71 'which is provided for inserting the seals 70, 70'.
  • a closable cavity 41 in the lower web 80 which is connected to the dead space by a channel (40, 40 ').
  • a dehumidifying substance is introduced into this cavity, for example silica gel, which can also contain a moisture indicator, and this substance can be replaced. It can be in an air-accessible capsule.
  • the Cavities 41, 41 'and the channels 40, 40' can also serve, when the dead space is filled with medium, to absorb temperature-dependent changes in volume of the medium without a substantial increase in pressure in the dead space.
  • the polarizing filter disks can be provided on the outside and / or inside with protective layers, e.g. outside with an anti-reflection layer and inside with a sliding layer.
  • the rotatable polarization filter disc 5, 5 ' is designed such that the circumferential radius of the polarization filter disc is smaller than the nominal radius of the polarization filter over an angular range of somewhat more than 90 ° by the amount of the material thickness of the above-mentioned actuating member 46 -Disc.
  • a radial recess 65 is worked into the periphery of the disk 5, 5 ', into which the actuating member 46 to be described engages.
  • This member 46 is a wire, for example made of rust-proof spring steel, spring bronze or a correspondingly stiff, flexible plastic, which is bent at essentially one end at a right angle and the crank 60 in the form of a bar into the associated groove or recess 65 in engages the rotatable polarizing filter discs. At least one of the organs 46, 46 'can be pre-bent over a length which corresponds to at least a quarter of the circumference of the rotatable polarization filter disk in such a way that its material deforms in the straight state and in the state bent around the polarization filter radius approximately equal bending stresses occur.
  • the organ is provided with a second cropping 62, which lies in a plane perpendicular to the first cropping and into an speaking opening of the actuator 47 engages.
  • a second cropping 62 which lies in a plane perpendicular to the first cropping and into an speaking opening of the actuator 47 engages.
  • the organ 46 can also be in the form of a narrow band or strip of the material specified above. This embodiment is not shown here, but only in the following figures; the tape has e.g. a width of 0.6 to 1 mm and a thickness of 0.15 to 0.3 mm, depending on the material used. In the case of plastics, a transparent material can be selected, as a result of which the twisting mechanism is almost invisible.
  • the two fixed polarization filter disks 5, 5 ' can be positioned and installed in such a way that, with glasses worn normally, the glare of a horizontal surface reflecting sunlight is reduced to a minimum so that the polar plane of the rotatable polarization filter disks 5, 5 'to the polarization plane of the fixed polarization filter disks 6, 6' have essentially parallel polarization planes corresponding to the least darkening, and that the latter polarization filter disks 5, 5 'by up to about Can be rotated 90 ° synchronously in order to achieve maximum darkening.
  • a flexible band 46A is selected as the twisting means transmitter, which is bent at 60 as in the described embodiments and engages in the rotatable filter disk 5, 5 '.
  • the position of the cropping and the length of the band 46A are selected so that in the "upper" end position 60A the cropping (shown in dashed lines), ie after passing through an arc of approximately 90 °, still a free arc W from 10 ° to approx. 45 ° is available. This has the advantage that the points of greatest darkness and brightness can be set with certainty.
  • 9B shows the band 46A and the slide 47 which largely encompasses the web 81.
  • FIGS. 10A and 10B now show, in an analogous representation to FIGS. 9A and 9b, a further embodiment of the light protection goggles according to the invention, namely a different form of rotary adjustment of the filter disk 5.
  • a gear segment 90 is incorporated into the rotatable filter disk 5 or into a narrow ring frame, into which it can be inserted, and a worm 92, which is fastened on a shaft 94, engages in this tooth segment.
  • the shaft 94 is sealed to the outside in the web 81 and in the attachment of the frame 82.
  • the knurled wheel 96 projects outwards over the web 81, with the aid of which the shaft 94 and thus the worm 92 and the filter disk 5 can be rotated.
  • This embodiment has i.a. the advantage that a once selected setting of the polarization filter disks remains unchanged until a new setting is made.
  • FIG. 11 shows a further embodiment of the light protection glasses according to the invention.
  • the rotatable filter disks 5, 5 ' are tightly inserted, for example glued, into a narrow ring frame 98.
  • the rotating member 46 here a band 46A, lies on the circumference of the ring frame 98 and, like in the other embodiments, is cranked at 60. So that the ring frame 98 can rotate easily in the eyeglass frame 82, it does not abut the latter, but runs on cams 100 which protrude outward from its periphery.
  • FIG. 11 it is shown that the sealing of the ring frame 98 to the outside serves a V-lip seal 102, while in FIG. 12 a simple oblique lip seal 104 is selected.
  • FIG. 13 shows further embodiments in which the two filter disks 5, 5 'and 6, 6' slide on each other without dead space.
  • the previously mentioned V-lip seal is used in FIG. 13 and the oblique lip seal in FIG. 14.
  • the seals mentioned are ring seals. They preferably consist of an elastic, spring-hard and self-lubricating material such as nylon (polyamide) or Teflon (polytetrafluoroethylene).
  • FIGS. 17 and 18 show a particularly preferred embodiment of the light protection goggles according to the invention, in which the adjustment of the polarizing lenses is carried out particularly precisely and the inventive sealing of the interior of the glasses against the outside world is particularly effective and simple.
  • FIG. 17 shows an eyeglass frame 2 with frames 82 and 82 'as well as an upper web 81 and a lower web 80.
  • a worm shaft 204 is horizontally mounted in the upper web 81 and is provided with two worms 205 and 205 '. These worms engage in external toothings 214 of rotating frames 206, 206 ', which receive the rotatable polarizing disks 207.
  • the worm shaft 204 is guided outwards on one side through a sealing packing 212 through the side wall of the upper web 81 and carries an actuating wheel 211 on the outside.
  • 202 is an eyeglass temple.
  • the assembly of the glasses is very simple in that the glasses frame 2 is composed of two parts, which are glued together (Fig. 18).
  • the brackets 202 are fastened to the front part 201, and the rear part 203, into which the fixed polarization disk 209 is inserted, is combined with the front part 201 when the worm shaft, the individual seals and the frame 206 with the rotatable polarization disk 207 are inserted in the latter .
  • a clear disk 208 which hermetically seals the inside of the glasses from the outside world.
  • An optical correction lens 210 which is shown in broken and broken lines in FIG. 18, can also be attached in front of the clear lens. However, it is also possible to design the clear lens 208 as an optical lens.
  • the height of the spectacle frame is approximately 48 to 50 mm
  • the diameter of the lenses is approximately 40 to 42 mm
  • the thickness of the lenses is approximately 0.5 to 1 mm
  • their spacing is approximately 0.3 to 0.8 mm.
  • the disks 208 and 209 can also be interchanged in the glasses.
  • the light protection glasses according to the invention can be further supplemented and modified.
  • the polarization disks can be rotated, for example, by a miniature motor which acts via a reduction gear on the above-mentioned worm shaft 204 which is guided outwards on one side.
  • the mini adjusting motor is preferably powered by solar cells which are to be attached to the spectacle frame.
  • the mutual adjustment of the polarizing disks can also be automated.
  • photocells are provided in the area of the light striking the glasses, which is via an electronically known device
  • the control unit controls the adjustment motor in such a way that it rotates the polarization discs for optimal darkening.
  • the light protection goggles according to the invention can additionally have further features known per se; anti-glare flaps can be attached, the glasses or panes can be provided with further protective layers, e.g. against glare, ultraviolet, infrared, the glasses or
  • Windows can be tinted symmetrically or asymmetrically, contain phototropic additives, etc.

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Eyeglasses (AREA)

Abstract

Des lunettes de protection à paires de disques polarisants tournant en sens inverse se caractérisent par la fermeture hermétique de l'intérieur de la monture des lunettes. A cet effet, une étanchéité totale des éléments d'actionnement des disques est assurée, le cas échéant un espace mort minimum contenant de l'air est en outre maintenu entre les disques fixes et rotatifs de filtrage polarisant, les disques glissent l'un sur l'autre et/ou l'ensemble de l'espace mort se trouvant dans les lunettes est rempli d'un liquide ou d'un semi-solide.
EP93914718A 1992-06-25 1993-06-22 Lunettes de protection contre la lumiere Ceased EP0647331A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH200092 1992-06-25
CH2000/92 1992-06-25
PCT/EP1993/001618 WO1994000790A1 (fr) 1992-06-25 1993-06-22 Lunettes de protection contre la lumiere

Publications (1)

Publication Number Publication Date
EP0647331A1 true EP0647331A1 (fr) 1995-04-12

Family

ID=4223554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93914718A Ceased EP0647331A1 (fr) 1992-06-25 1993-06-22 Lunettes de protection contre la lumiere

Country Status (2)

Country Link
EP (1) EP0647331A1 (fr)
WO (1) WO1994000790A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5663779A (en) * 1994-03-09 1997-09-02 Ozmix, Inc. Variable transmission light polarizing lens assembly
EP0903132A1 (fr) * 1997-09-22 1999-03-24 Andreas Maurer Lunettes de couleur
FR3074310B1 (fr) * 2017-11-29 2020-03-20 Razvan Berechet Dispositif mecanique reglable manuellement pour lunettes a intensite de lumiere variable
CN114019745B (zh) * 2021-11-10 2023-08-01 安徽科技学院 一种可过滤强光或偏振光的成像拍摄系统和方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR994424A (fr) * 1949-07-01 1951-11-16 Procédé permettant de faire varier l'intensité des rayons électro-magnétiques perçus par un organe humain ou tout autre objet
US3371979A (en) * 1963-04-15 1968-03-05 William Beaumont General Hospi Fluid-filled variable density polarizing sunglasses
GB998246A (en) * 1964-04-03 1965-07-14 Pennsylvania Optical Company Adjustable density sunglasses
FR2219725A7 (fr) * 1973-02-26 1974-09-20 Rejasse Bernard
FR2537292B1 (fr) * 1982-12-01 1986-03-21 Rochon Rene Lunettes a pouvoir filtrant reglable
DE3800393A1 (de) * 1987-07-29 1989-07-20 Rainer Schmieg Abblendbare sehhilfe
GB2228341A (en) * 1989-02-16 1990-08-22 John Henry Holdings Adjustable light restricting polarising spectacles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9400790A1 *

Also Published As

Publication number Publication date
WO1994000790A1 (fr) 1994-01-06

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