CN1068120C - Eyepiece cover for optical device - Google Patents

Eyepiece cover for optical device Download PDF

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Publication number
CN1068120C
CN1068120C CN95120035A CN95120035A CN1068120C CN 1068120 C CN1068120 C CN 1068120C CN 95120035 A CN95120035 A CN 95120035A CN 95120035 A CN95120035 A CN 95120035A CN 1068120 C CN1068120 C CN 1068120C
Authority
CN
China
Prior art keywords
eyes
lens barrel
eyepiece
barrel part
lens
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.)
Expired - Fee Related
Application number
CN95120035A
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Chinese (zh)
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CN1150654A (en
Inventor
山本光男
永冈靖纪
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.)
Nikon Corp
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Nikon Corp
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 Nikon Corp filed Critical Nikon Corp
Publication of CN1150654A publication Critical patent/CN1150654A/en
Application granted granted Critical
Publication of CN1068120C publication Critical patent/CN1068120C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
    • G02B23/18—Housings; Caps; Mountings; Supports, e.g. with counterweight for binocular arrangements

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  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)
  • Lenses (AREA)
  • Viewfinders (AREA)

Abstract

To make outdoor air easily enter a space on the inner peripheral side of an eye cushion and to prevent an eyepiece from being fogged even in the case the user views through the optical instrument under a cold environment by forming an air hole in the eye cushion. In the eye cushion 10, the air hole 11 linking between the space S on the inner peripheral side of the eye cushion 10 and the outer peripheral side is formed, a port 110 on the outer peripheral side of the air hole 11 is formed at the end part on the observed object side of the eye cushion 10, that is, the part with an engagement part 13 formed and whose thickness is thicker than other parts. By forming the air hole 11 in the eye cushion 10 in such a way, the outdoor air flows into the space S on the inner peripheral side of the eye cushion 10 through the air hole 11, then, a temperature difference is hardly generated between the cooled eyepiece 1 and the air in the space S on the inner peripheral side in the case of observing through the binoculars under the cold environment, Thus, moisture content in the air in the space S is prevented from condensing on the lens 1.

Description

The lens barrel part near eyes of optical instrument
The present invention relates to be installed in the lens barrel part near eyes of the optical instrument of optical instrument eyepiece portion.
The lens barrel part near eyes of optical instrument of the prior art for instance, has the described form of Fig. 6.
Should be installed near the lens barrel part 10f of eyes on the binoculars as optical instrument, be hollow circle tube.This end near the lens barrel part 10f of eyes is installed in the eyepiece portion 5 of binoculars, and the other end contacts with observer's around eyes.Therefore, the observer has the eyepiece portion 5 and the observer of eyepiece lens 1 to seal near the inner space S of the lens barrel part 10f of eyes is assembled when making telescopic observation, is close to air-tight state.
But, in the prior art, when under cold environment, using optical instrument to observe, warm near the body temperature of the air person of being observed in the lens barrel part 10f inner space S of eyes.Therefore, just produce temperature difference between the air in cold eyepiece lens 1 and inner space S.Its result, during the cold eyepiece lens 1 of the air contact in the inner space S that the person's of being observed body temperature is warm, air is cooled, and airborne moisture will condense on the eyepiece lens 1, thereby form one deck mist on eyepiece lens 1.
The present invention makes in view of the above problems, uses optical instrument even its purpose is to provide a kind of under cold environment, also can not produce the lens barrel part near eyes of mist on the eyepiece lens.
To achieve these goals, the lens barrel feature partly near eyes of optical instrument of the present invention is: be hollow barrel-type, the space of light path between the eyepiece portion of observer's eyes and optical instrument has been guaranteed in the formation of its inner space, on this lens barrel part, also be formed with from it near eyes in all sides toward the airport of outer circumferential side.
Wherein, above-mentioned airport can be forniciform, so that the light of outer circumferential side can not directly enter interior all sides.In addition, be preferably formed as a plurality of above-mentioned airports.
Fig. 1 is the eyepiece portion of the present invention the 1st embodiment and mounted thereto the lens barrel sectional view partly near eyes.
Fig. 2 is the eyepiece portion of the present invention the 2nd embodiment and mounted thereto the lens barrel sectional view partly near eyes.
Fig. 3 is the eyepiece portion of the present invention the 3rd embodiment and mounted thereto the lens barrel sectional view partly near eyes.
Fig. 4 be air the present invention the 3rd embodiment near the key diagram that flows in the lens barrel part of eyes.
Fig. 5 is the front view (FV) of the binoculars of one embodiment of the invention.
Fig. 6 is eyepiece portion of the prior art and mounted thereto 's the sectional view near the lens barrel part of eyes.
Below, with reference to description of drawings one embodiment of the present of invention.
The lens barrel part near eyes of the optical instrument of first embodiment of the invention at first, is described with reference to Fig. 1.
The optical instrument of present embodiment is the binoculars with two optical systems, and the lens barrel near eyes of present embodiment partly is installed in the eyepiece portion of these binoculars.
The eyepiece of the binoculars of present embodiment has: eyepiece lens 1, eyepiece lens 1 remained in all sides cylindrical shape eyepiece lens inside casing 30, supporting eyepiece lens inside casing 30 and allow its cylindrical shape eyepiece lens housing 35 that moves at optical axis direction, make the diopter ring 35 that eyepiece lens inside casing 30 moves at optical axis direction with eyepiece lens 1, the diopter ring 20 that eyepiece lens inside casing 30 is moved at optical axis direction with eyepiece lens 1.Below, the right side among Fig. 1, promptly observer place side is called observer's side; The left side among Fig. 1, promptly object of observation place side is called the object of observation side.
Eyepiece lens housing 35 is installed on the body housing 2 of binoculars.In interior week of this eyepiece lens housing 35 and be positioned at observer's side end place, be formed with spiral fashion female screw 36 around optical axis.Eyepiece lens inside casing 30 is located at interior all sides of eyepiece lens housing 35.In the periphery of eyepiece lens inside casing 30 and be positioned at the pars intermedia office of optical axis direction, be formed with spiral fashion pin thread 31 around optical axis.The pin thread 31 of eyepiece lens inside casing 30 is twisted with the female screw of eyepiece lens housing 35 36 and is closed.
Diopter ring 20 is columnar.The observation side of side face within it is formed with the lens frame installation portion 21 with the external diameter basically identical of eyepiece lens inside casing 30; The object of observation side of side face within it is formed with the operating portion 22 with the external diameter basically identical of eyepiece lens housing 35.This diopter ring 20 is to be provided with like this: the outer peripheral face of observer's side end of eyepiece lens inside casing 30 and the inner peripheral surface of lens frame installation portion 21 join; Some gaps are arranged between the outer peripheral face of the inner peripheral surface of operating portion 22 and eyepiece lens housing 35., twist and closing fixedly Screw 40 to outer survey person's side end of eyepiece lens inside casing 30 from the lens frame installation portion 21 of diopter ring 20.Diopter ring 20 by this fixedly Screw 40 fixing, with respect to eyepiece lens inside casing 30, can not rotate and can not move around optical axis at optical axis direction.Therefore, make diopter ring 20 when optical axis rotates, eyepiece lens inside casing 30 also rotates around optical axis thereupon.As previously mentioned, on the periphery of eyepiece lens inside casing 30, be formed with spiral fashion pin thread 31 around optical axis; In the interior week that is installed in the eyepiece lens housing 35 on the body housing 2, be formed with pin thread 31 and twist the female screw 36 that closes.Therefore, when making diopter ring 20 around the optical axis rotation, not only diopter ring 20 itself rotates on one side around optical axis on one side and moves at optical axis direction; The eyepiece lens 1 of fixing the eyepiece lens inside casing 30 of diopter ring 20 and being held all sides within it also rotate one side around optical axis on one side and moves at optical axis direction.On diopter ring 20, be formed with and be used to install aftermentioned and recess 23 partly be installed near the lens barrel near eyes of the lens barrel part of eyes.Should recess 23 partly be installed near the lens barrel of eyes, recessed along the direction of the outer circumferential optical axis C of the lens frame installation portion 21 of diopter ring 20.
Order tube 10 is rubber systems, is hollow circle tube.This inner space S near the lens barrel part 10 of eyes is the space of guaranteeing light path between observer's eyes and the eyepiece portion.At this object of observation side end, be formed with fitting projection 13 along week in it near the lens barrel part 10 of eyes.This fitting projection 13 is partly installed recess 23 towards the lens barrel near eyes outstanding near optical axis C direction and embedding eyepiece portion.In observer's side of this fitting projection 13, dwindle near the lens barrel part internal diameter of eyes, form the round plate 14 that the observer side end face with diopter ring 20 joins.In observer's side of this round plate 14, form barrel 15, the internal diameter of this barrel 15 and external diameter poor, be wall thickness, be certain on optical axis direction.In observer's side of barrel 15, form edge portion 16.This edge portion 16 is outstanding slightly towards the direction of optical axis C, when observation, contacts with observer's around eyes.On lens barrel part 10, be formed with the airport 11 that leads to outer circumferential side from its inner space near eyes.The object of observation side end that the outer circumferential side mouth 110 of this airport forms near the lens barrel part 10 of eyes, promptly be formed on fitting projection 13, thick place, other position of wall ratio.Interior all side mouths 111 of this airport 11 are formed on the round plate 14.Airport 11, the direction from its outer circumferential side mouth 110 towards optical axis C turns quarter bend after extending, and extends towards the direction that is parallel to optical axis C, until interior all side mouths 111.That is to say that the section configuration of this airport 11 is L fonts.
After being provided with airport 11 on the lens barrel part 10 near eyes, even under cold environment, use telescope, because the air of outside flows in the inner space S near the lens barrel part 10 of eyes by airport 11, so, between the air in cold eyepiece lens 1 and inner space S, produce temperature difference hardly.Therefore, can prevent that the interior airborne hydrogenesis of inner space S is on eyepiece lens 1.In the present embodiment, because interior all side mouths 111 of airport 11 are formed near eyepiece lens 1 surface, so its effect is fine.
In the present embodiment, be installed on the diopter ring 20 that optical axis rotates, so also rotate around optical axis with diopter ring 20 near the lens barrel part 10 of eyes near the lens barrel part 10 of eyes.Like this, when using under intense light source environment such as the sun, because the position relation of the sun etc. and the outer circumferential side mouth 110 of airport 11, the light of light sources such as the sun can enter in the airport 11.But, in the present embodiment,,, can not enter inner space S, so lucifuge fully from interior all side mouths 111 even enter the outer circumferential side mouth 110 of airport 11 from the light of the sun etc. because the shape of airport 11 is L fonts.
Below, the lens barrel part near eyes of the 2nd, the 3rd embodiment of the present invention is described with reference to Fig. 2-Fig. 4.Fig. 2 represents the lens barrel part near eyes of the 2nd embodiment, and Fig. 3 and Fig. 4 represent the lens barrel part near eyes of the 3rd embodiment.
In binoculars, classify in the focal adjustments mode, the telescope that is called the center-spot formula is arranged.This center-spot formula is the knob (focusing button) that is positioned at two optical system centers by rotation, makes two optical systems in focus.In this center-spot formula telescope, consider observer's left and right sides eyesight difference,, in an optical system, be provided with the diopter ring, the diopter ring is not set in another optical system in order to regulate the focus deviation of two optical systems.
Here, the lens barrel embodiment partly near eyes that is installed in the eyepiece portion that does not establish the diopter ring is described.
Lens barrel part 10a, the 10b near eyes of the 2nd and the 3rd embodiment is directly installed on respect to body housing 2 basically not on the eyepiece lens frame 30a that optical axis rotates.Lens barrel part 10a, the 10b of these embodiment near eyes, when telescopical optical axis C becomes level substantially with respect to ground, at upper portion, be formed with the L font airport 11 same with the 1st embodiment, in lower portion, being formed with section configuration is rectilinear airport 11a, the 11b that directly advances.The straight moving type airport 11a of the 2nd embodiment as shown in Figure 2, it connects direction and favours optical axis C.The straight moving type airport 11b of the 3rd embodiment as shown in Figure 3, it connects direction perpendicular to optical axis C.
Usually when using telescope, intense light sources such as the sun are positioned at telescopical top or oblique upper place, and the situation that is positioned at the telescope below does not almost have.Therefore, in eyepiece portion, do not establish the diopter ring, near lens barrel part 10a, the 10b of eyes not with the diopter ring under the situation that optical axis rotates, even section configuration is that rectilinear airport 11a, 11b are under telescopical user mode, as long as on the position of downside, form airport 11a, 11b, just can prevent that the light of light source from entering inner space S.
In addition, as shown in Figure 4, successfully circulate in order to make near the inner space S of the lens barrel part 10b of eyes and the air between the outer circumferential side space, be preferably formed as a plurality of airport 11a, 11b, and with respect to an airport 11b, with optical axis C is the center, forms another airport 11 on the position of opposition side.In these embodiments, near the lens barrel part 10a of eyes, the downside of 10b, form straight moving type emptying aperture 11a, 11b, directly advance shape airport 11a, 11b with respect to this, with optical axis C is the center, is being separated by 180 ° position, promptly near the lens barrel part 10a of eyes, the upside of 10b, form L font airport 11,11.Form airport 11,11st at the upside near lens barrel part 10a, the 10b of eyes, L font airport 11, the light of the sun etc. can not directly enter in the inner space S near lens barrel part 10a, the 10b of eyes.
When being installed to this lens barrel part 10a, 10b near eyes in the eyepiece portion, for not mistaken above-below direction, preferably the filling expression is near the lens barrel part 10a of eyes, the mark of 10b above-below direction.Perhaps,, be preferably in the installation portion of eyepiece portion and be used to be installed in the lens barrel part 10a on this eyepiece portion installation portion, the installation portion of 10b, breach or projection are set near eyes in order to limit the installation site of optical axis peripheral direction with respect to eyepiece portion.
Some lens barrel near eyes partly is directly installed on not on the eyepiece lens frame that optical axis rotates.No matter have or not the diopter ring, this lens barrel part near eyes is not rotated around optical axis with respect to eyepiece portion, in this case, can adopt above-mentioned straight moving type airport 11a, 11b.
Fig. 5 is the telescopical front view (FV) that the eyepiece of the foregoing description is installed.This telescope is above-mentioned center-spot formula telescope, in the eyepiece portion on right side the diopter ring is installed among the figure, in the eyepiece portion in left side the diopter ring is not installed among the figure.
Wherein, be provided with in the eyepiece portion of diopter ring (the eyepiece portion on right side), the lens barrel part 10 near eyes (being formed with a plurality of airports 11 thereon) of the 1st embodiment is being installed; Be not provided with in the eyepiece portion of diopter ring (the eyepiece portion in left side), the lens barrel part 10a near eyes of the 2nd embodiment is being installed.
In the present embodiment, though in left and right sides eyepiece portion, be provided with different lens barrel part 10,10a respectively near eyes, but also the identical lens barrel part 10 near eyes can be set in left and right sides eyepiece portion, that is the lens barrel part 10 near eyes of the 1st embodiment of band L font airport 11, also can be set in left and right sides eyepiece portion.
Though among the above embodiment all is circular cross section near the lens barrel of eyes part, is not defined as circle, according to design go up needs can make elliptic cross-section, polygonal cross section etc., so long as the getting final product of hollow tube-shape.
In addition, though all being mounted in the eyepiece portion of binoculars near the lens barrel of eyes part of above embodiment is not limited thereto.For example, also can be applicable to astronomical telescope, field glass, camera etc.Certainly also be applicable to the lens barrel part near eyes of other optical instrument.Astronomical telescope mainly is to use at night, does not have intense light sources such as the sun, so the simplest linear that is shaped as of airport gets final product.
According to present embodiment, on lens barrel part, airport is set near eyes, when under cold environment, using optical instrument, because the air of outside flows in the inner space near the lens barrel part of eyes by airport, so, between cold eyepiece lens and the air in the inner space, produce temperature difference hardly.Therefore, the airborne moisture in the inner space can not condense on the eyepiece lens, can prevent to form on eyepiece lens mist.
In addition, when airport is crooked shape, can directly not enter in the inboard air of lens barrel part near eyes through this airport near the light in the lens barrel part outside of eyes, so, can not dazzle to surveying object.When a plurality of airport, the hole that has imports the air of outside near the lens barrel part of eyes inboard, and the hole that has is sent to the outside to the air in the inner space, so, can get the air of outside in the inner space effectively, prevent to form on the eyepiece lens mist more reliably.
According to the present invention, owing to be provided with airport near the lens barrel of eyes part, the air of outside enters in the lens barrel part inner space near eyes easily, even use optical instrument under cold environment, also can form mist hardly on the eyepiece lens.

Claims (3)

1. the lens barrel part near eyes that is installed in the optical instrument in the optical instrument eyepiece portion is characterized in that, is hollow tube-shape, forms from its inboard airport that leads to outer circumferential side on this lens barrel part near eyes.
2. optical instrument as claimed in claim 1 is characterized in that near the lens barrel part of eyes hollow tube-shape has the space of guaranteeing light path between observer's eyes and the eyepiece portion near the inner space of the lens barrel part of eyes; Above-mentioned airport is crooked the way of leading to outer circumferential side from the inboard, and the light of outer circumferential side can not directly enter in the inner space.
3. the lens barrel part near eyes of optical instrument as claimed in claim 1 or 2 is characterized in that above-mentioned airport has a plurality of.
CN95120035A 1994-12-05 1995-12-01 Eyepiece cover for optical device Expired - Fee Related CN1068120C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP300920/94 1994-12-05
JP6300920A JPH08160494A (en) 1994-12-05 1994-12-05 Eye cushion for optical instrument
JP300920/1994 1994-12-05

Publications (2)

Publication Number Publication Date
CN1150654A CN1150654A (en) 1997-05-28
CN1068120C true CN1068120C (en) 2001-07-04

Family

ID=17890724

Family Applications (1)

Application Number Title Priority Date Filing Date
CN95120035A Expired - Fee Related CN1068120C (en) 1994-12-05 1995-12-01 Eyepiece cover for optical device

Country Status (4)

Country Link
JP (1) JPH08160494A (en)
KR (1) KR100304039B1 (en)
CN (1) CN1068120C (en)
TW (1) TW334138U (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10001736A1 (en) * 2000-01-17 2001-07-19 Steiner Optik Gmbh Eyecup for binoculars
JP4333875B2 (en) * 2004-03-09 2009-09-16 株式会社 ニコンビジョン Eyepiece and binoculars
CN106932905A (en) * 2017-02-27 2017-07-07 阿里巴巴集团控股有限公司 Virtual reality helmet
CN113433124B (en) * 2021-05-31 2024-04-26 浙江芯植微电子科技有限公司 Intelligent metallographic microscope based on metal analyzer
CN113671686A (en) * 2021-07-16 2021-11-19 河北汉光重工有限责任公司 Infrared sighting telescope lightweight diopter adjustable eyepiece

Also Published As

Publication number Publication date
KR100304039B1 (en) 2001-11-22
TW334138U (en) 1998-06-11
KR960024495A (en) 1996-07-20
CN1150654A (en) 1997-05-28
JPH08160494A (en) 1996-06-21

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