JPS5929201A - Pentagonal prism having fresnel lens or the like - Google Patents
Pentagonal prism having fresnel lens or the likeInfo
- Publication number
- JPS5929201A JPS5929201A JP13845182A JP13845182A JPS5929201A JP S5929201 A JPS5929201 A JP S5929201A JP 13845182 A JP13845182 A JP 13845182A JP 13845182 A JP13845182 A JP 13845182A JP S5929201 A JPS5929201 A JP S5929201A
- Authority
- JP
- Japan
- Prior art keywords
- fresnel lens
- prism
- pentagonal prism
- optical system
- intrusion
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Viewfinders (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
【発明の詳細な説明】
本Q Jq +−?フレ2・ルレンズを一体+71成形
したベンタブ゛ノズL:こ林するっ
レフレックスカメラ等j・こ便用6 tt 6ペンタグ
)ズム=2“ハてrj、一般もこ光υ入射面近<1こ、
袂野醍辺V屯乳をづ弓るくするたり1こフレネノンレ/
ズをも己すする。[Detailed description of the invention] Book Q Jq +-? Bent tab nose L with 2 lenses integrally molded: 6 tt 6 pen tags for reflex cameras, etc.) Zm = 2" High rj, general light υ near incident surface <1" ,
Haruno Daibe V ton milk is made to be smooth and 1 ko Frenenonre/
I also slurp myself.
こつフレス、ルレノズ吋、そv151・U白抜7)集光
屈折口をガモス―上乙こ加工杉板することは困難であり
1便すl−を王2してアクリル朗雇等V会成シ噌′l:
圧稈叡形せたけ射出成形して1′「られていた−
一方、ペンタプリズムは、合成樹脂1こよって成彩する
1こけ超厚肉品であり、固化収縮、熱収縮;こ伴う面精
明つ低下や内部歪1こよる脈理Q発生等Vため、ガラス
ブロックを研磨して製作されていた。7) It is difficult to make the condensing and refracting port with a cedar board processed with Gamos-Kamiotsuko, so I made 1 piece of 2 pieces of acrylic, etc. Shi'l:
On the other hand, a pentaprism is a one-piece ultra-thick-walled product made of synthetic resin, which undergoes solidification shrinkage, heat shrinkage, and accompanying surface refinement. Because of problems such as decreased strength, internal strain, and the occurrence of striae, they were manufactured by polishing glass blocks.
こりよつ番こ、ベンタグリズムとフレネルレンズとけそ
υ素材が違っており、それぞれを別体としτan−する
ほかなかったつで、そつためυコスト高1J勿論つこと
、別#−υもVをカメラ等に組込むためV間隔や光軸ず
れ7)位置υ調整。In this case, the Ventagrism and Fresnel lens are made of different materials, so I had no choice but to make each one of them separately, and because of that, the cost was high 1J. Adjustment of V interval and optical axis deviation 7) Position υ in order to incorporate into a camera, etc.
接眼ルー憚υ焦点近く1こあるため目立ち易いコミυ附
着等υ間鴫を生じていた。Because there was one eyepiece near the focal point, there were easily noticeable spots and spots between the eyes.
木兄明肴等は、ペンタフリズムりような超厚肉品であづ
ても、金型中で鵬脂を加熱溶融させて歪を除き、徐冷固
化時)こ加圧しながらキャビティ容積を縮小させること
1こよって内部歪υない蘂精匿7)成形品を得ることが
出来ることを見出した。Even if it is an ultra-thick-walled product such as a pentaphrism, the mold is heated and melted to remove distortion, and during slow cooling and solidification, the cavity volume is reduced while applying pressure. It has been found that 1) it is possible to obtain a molded product with no internal distortion 7).
本発明は、上記υ方法lこよってペンタプリズムを合成
樹脂で成形する部会、ぞυ光υ入射面1こフレネルレン
ズを一体として成形すること1こより、従来υよう(こ
別体として別O素材で製作することに伴って生じていた
間頑を唾で解消したペンタプリズムを1尋ようとするも
のである。The present invention utilizes the above-mentioned υ method to mold a pentaprism with synthetic resin, and molds the υ light incident surface 1 and Fresnel lens as one piece. This is an attempt to create a pentaprism that eliminates the rigidity that occurred with the production of a pentaprism.
第1図はペンタプリズム本体17)光入射面2(コ、ヘ
ンタグリズム成形時に同時1こフレネルレンズ而3とス
プリットイメージ4を形成したもつであり、上記の加圧
成形;こよって、こつような超孝肉成形品)こありても
、いわゆる「ひけ」V影響を受けr、精#lILつ高い
プリズム反射面、フレネルレンズ1m ’fr 面、ス
プリットイメージ0楔面が形成出来る。Figure 1 shows the pentaprism main body 17), the light entrance surface 2 (c), the Fresnel lens 3 and the split image 4 formed at the same time during the pentaprism molding; Even with this (super thin molded product), it is possible to form a prism reflective surface with a high precision, a Fresnel lens 1m'fr surface, and a split image 0 wedge surface due to the effect of so-called "sink" V.
第2図は、ペンタプリ′ズ台入射面υフレネルレンズ3
ど共て7ヤツタ速度、絞1直等υファインダー内衣示を
するためυ穴或は凹へ5を光学的な不作用向1こ同時l
こ成形した列である。Figure 2 shows the entrance plane of the pentapris table υ Fresnel lens 3.
In both cases, the speed is 7, and the aperture is 1 orthogonal.In order to indicate the inner diameter of the υ finder, insert 5 into the υ hole or concave in an optically inactive direction.
This is the formed column.
本発明υペンタプリズムは、上記つよう1こ、フレネル
レンズ等υ光学部材を一体tこ成形したつで、
1) 一体成形(こより複数υ光学部材を一度)こ成ダ
ウンが実現出来る。The υ pentaprism of the present invention is made by integrally molding the above-mentioned υ optical members such as a Fresnel lens. 1) It is possible to realize integral molding (multiple υ optical members are molded at once).
+1) ぺ4タブリズムとフしノネルレンズとO間υ
位置調整が不要であり、常1こ精度υ高い光学系が得ら
れる。+1) P4 tabism, Fushinonel lens and O υ
No position adjustment is required, and an optical system with a high accuracy of υ by 1 can be obtained.
111) ベンタグリズムと7レールレンズe −K
化するこ(!:Iこより、両者間iこ附着するファイ
ンダー内ゴミの問題が解決する。111) Ventagrism and 7 rail lens e-K
This will solve the problem of dust stuck in the viewfinder between the two.
という効果が生じる。This effect occurs.
第1図は本発明υペンタプリズム7)l実施例υ側面図
、第2図は同じく池7)実姉例の背面図1=ベンターソ
リズム 2:光入射面
3:フレネルレンズ 4ニスプリントイメージ5:凹与
特杆出艶人 小西六傅真王業味式会社出顎人代哩へ
弁I士 咋 藤 文 男(ほか1名)Figure 1 is a side view of the inventive υ pentaprism 7) l Example υ, and Figure 2 is the same pond 7) Rear view of the real sister example 1 = Ventersolism 2: Light incidence surface 3: Fresnel lens 4 Varnish print image 5 :Konishi Rokufu Shino business style company Dejajin representative
Ben Ishi Fumi Kui Fuji (and 1 other person)
Claims (1)
材を一体゛こ呟杉17tことを特徴とするフレ坏ルレン
ズ号を胃するベンタグリズムFre2, Lurenz, Spriso), Image, etc. v Gen Gakkai [
Bentagrism, which uses a full lens, is characterized by being made of 17 tons of Japanese cedar.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13845182A JPS5929201A (en) | 1982-08-11 | 1982-08-11 | Pentagonal prism having fresnel lens or the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13845182A JPS5929201A (en) | 1982-08-11 | 1982-08-11 | Pentagonal prism having fresnel lens or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5929201A true JPS5929201A (en) | 1984-02-16 |
Family
ID=15222312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13845182A Pending JPS5929201A (en) | 1982-08-11 | 1982-08-11 | Pentagonal prism having fresnel lens or the like |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5929201A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6429743U (en) * | 1987-08-13 | 1989-02-22 | ||
JPH0463526A (en) * | 1990-07-02 | 1992-02-28 | Toshiaki Kano | Culture medium-circulating device for hydroponic culture |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55166632A (en) * | 1979-06-12 | 1980-12-25 | Olympus Optical Co Ltd | Finder for single-lens reflex camera |
-
1982
- 1982-08-11 JP JP13845182A patent/JPS5929201A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55166632A (en) * | 1979-06-12 | 1980-12-25 | Olympus Optical Co Ltd | Finder for single-lens reflex camera |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6429743U (en) * | 1987-08-13 | 1989-02-22 | ||
JPH0463526A (en) * | 1990-07-02 | 1992-02-28 | Toshiaki Kano | Culture medium-circulating device for hydroponic culture |
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