JPS63165633U - - Google Patents
Info
- Publication number
- JPS63165633U JPS63165633U JP5964587U JP5964587U JPS63165633U JP S63165633 U JPS63165633 U JP S63165633U JP 5964587 U JP5964587 U JP 5964587U JP 5964587 U JP5964587 U JP 5964587U JP S63165633 U JPS63165633 U JP S63165633U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- waist level
- refractive power
- level finder
- finder according
- 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
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
Landscapes
- Viewfinders (AREA)
Description
第１図は本考案の基本的な実施例を示す断面図
、第２図は反射光学素子をダハプリズムとした実
施例の断面図、第３図は数値実施例の断面図、第
４図は従来のウエストレベルフアインダーの断面
図である。
１……対物レンズ、１ａ……対物レンズ前群、
１ｂ……対物レンズ後群、２……反射光学素子、
３……集光レンズ。
Fig. 1 is a sectional view showing a basic embodiment of the present invention, Fig. 2 is a sectional view of an embodiment in which the reflective optical element is a roof prism, Fig. 3 is a sectional view of a numerical embodiment, and Fig. 4 is a conventional one. FIG. 3 is a sectional view of the waist level finder of FIG. 1... Objective lens, 1a... Objective lens front group,
1b... Objective lens rear group, 2... Reflective optical element,
3...Condensing lens.
Claims (1)
ズ前群と正の屈折力を有する対物レンズ後群とに
より全体的に正の屈折力の対物レンズを構成し、
該対物レンズ後方に、光線をウエストレベル用の
接眼レンズへ導くダハ面を有する反射光学素子を
設けたことを特徴とするウエストレベルフアイン
ダー。 (2) 前記反射光学素子はプリズムであることを
特徴とする実用新案登録請求の範囲第１項記載の
ウエストレベルフアインダー。 (3) 前記対物レンズの予定結像面近傍に接眼レ
ンズを設けたことを特徴とする実用新案登録請求
の範囲第２項記載のウエストレベルフアインダー
。 (4) 前記対物レンズに少なくとも一部のレンズ
面に非球面を施したことを特徴とする実用新案登
録請求の範囲第１項記載のウエストレベルフアイ
ンダー。[Claims for Utility Model Registration] (1) An objective lens having a positive refractive power as a whole is constituted by a front objective lens group having a negative refractive power and a rear objective lens group having a positive refractive power in order from the object. ,
A waist level finder characterized in that a reflective optical element having a roof surface for guiding light to a waist level eyepiece is provided behind the objective lens. (2) The waist level finder according to claim 1, wherein the reflective optical element is a prism. (3) The waist level finder according to claim 2 of the utility model registration, characterized in that an eyepiece lens is provided in the vicinity of the intended image formation plane of the objective lens. (4) The waist level finder according to claim 1, wherein at least a portion of the lens surface of the objective lens is aspheric.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5964587U JPS63165633U (en) | 1987-04-20 | 1987-04-20 | |
| US07/180,451 US4957356A (en) | 1987-04-20 | 1988-04-12 | Finder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5964587U JPS63165633U (en) | 1987-04-20 | 1987-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63165633U true JPS63165633U (en) | 1988-10-28 |
Family
ID=30891329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5964587U Pending JPS63165633U (en) | 1987-04-20 | 1987-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63165633U (en) |
-
1987
- 1987-04-20 JP JP5964587U patent/JPS63165633U/ja active Pending
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