JPH0225814A - Optical device - Google Patents

Abstract

PURPOSE:To simplify the assembly of a mold lens and, simultaneously, to execute a fitting with a high accuracy by providing the abutting part of a small surface contact to abut on to a lens holding member to a fitting part outside the effective surface of the lens. CONSTITUTION:Circular projections 1a-1c made into pairs are formed unitedly with the lens, and they are provided as one part of the fitting part. In a space opened in one direction of a holding member 2 of a plastic lens, plane surfaces 2a, 2b, 2c, 2d, 2e and 2f to abut on the projections 1a, 1b and 1c and abutting surfaces 1d, 1e and 1f are arranged. A surface interval l t2 of the projections 1a and 1c of and a surface interval l t3 of the 1b and 1d of a plastic lens 1 are made thicker than an internal pressure l t1 except for the projecting parts, and a stability after an insertion is increased. Thus, at the time of inserting the plastic lens 1 into the holding member 2, the projections 1a, 1b and 1c and abutting surfaces 1d, 1e and 1f surfaces are not brought into contact with the holding member 1 in an insertion early stage, and the member 2 can be smoothly inserted into a prescribed position with a high accuracy.

Description

【発明の詳細な説明】 ［産業上の利用分野］ モールド形成されたレンズをレンズ保持部材に高精度で
ありながら簡便に装着した光学装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an optical device in which a molded lens is mounted on a lens holding member with high precision and with ease.

［従来の技術］ 従来よりモールド形成されたプラスチックレンズを同じ
くモールド形成されたレンズ保持部材に嵌め込み式に装
着することは、光学系を軽量化するとともに製造価格を
際立って低下させるのに役立ので実用価値が高い。[Prior Art] Traditionally, fitting a molded plastic lens into a molded lens holding member has been helpful in reducing the weight of the optical system and significantly lowering the manufacturing cost. High practical value.

例えばプラスチックレンズの保持には、プラスチックレ
ンズを保持部材に対して、レンズの光軸方向に沿って組
み込み保持する方向が多く提案されているが、また、レ
ンズの光軸と垂直な方向よりモールドレンズを保持部材
に組込む場合には、保持部材がレンズ光軸付近で分割さ
れた構造になっている。For example, many proposals have been made to hold a plastic lens by incorporating the plastic lens into the holding member along the optical axis direction of the lens. When the lens is assembled into a holding member, the holding member has a structure in which it is divided near the optical axis of the lens.

プレスチックレンズを保持部材に対して、レンズの光軸
方向に沿って組込み保持する場合は、レンズの枚数が増
加してくると、大２小レンズのレンズ配置の関係よりす
べてのレンズを同一方向から組込むことがむずかしい難
点がある。また、すべてのレンズを同一方向から組込む
ことを実現するためには、わざわざレンズ保持部材を大
きくする必要があった。When a plastic lens is assembled and held in a holding member along the optical axis direction of the lens, as the number of lenses increases, it is necessary to place all the lenses in the same direction due to the lens arrangement of the large and 2 small lenses. There is a drawback that it is difficult to incorporate from the beginning. Furthermore, in order to incorporate all the lenses from the same direction, it was necessary to take the trouble to make the lens holding member larger.

一方、プレスチックレンズを保持部材に対してレンズの
光軸方向と垂直な方向より組込む場合には、保持部材を
レンズ光軸付近で分割しなければならず、レンズが光軸
より下半分でしか保持されなかったり、また分割された
保持部材の位置ズレによりレンズが倒れたりあるいは傾
いて光学性能を低下させていた、４ ［発明が解決しようとしている問題点］本発明はモール
ドレンズの組込みが簡単で且つ高精度の取付を保証し得
る装置を提供する。On the other hand, when inserting a plastic lens into a holding member in a direction perpendicular to the optical axis of the lens, the holding member must be divided near the optical axis of the lens, and the lens can only be inserted in the lower half below the optical axis. [Problems to be solved by the invention] The present invention makes it easy to assemble a molded lens. To provide a device that can guarantee high-precision installation.

［問題点を解決するための手段］ レンズの有効面外の取付部にレンズ保持部材に当接する
小面接・の当接部を設けたことで問題を解決した。[Means for Solving the Problem] The problem was solved by providing a contact portion with a small surface that abuts the lens holding member on the attachment portion outside the effective surface of the lens.

［実施例］ 第１〜３図は本発明の第１の実施例を示し、第１図は本
発明の要部斜視図で、第２図は両要素を結合して正面か
ら見た形態を示す、ｌはプラスチックレンズ、ｌａ、ｌ
ｂ、ｌｃは対をなす円形の突起で、レンズと一体成形さ
れ取付部の一部として設けられている。取付部の表裏面
に配された突起１ａ、ｌｂ、ｌｅは第２図で示すように
レンズの挿入方向に一致してレンズ光軸な通る垂線から
の距離ｆＬａ、ｌｂが９．ａ＜交すの関係になる様に設
定されている。またｌｄ、ｌｅ、ｉｆはそれぞれレンズ
の保持部材２に少なくとも一部が当接し上下、左右方向
の位置を決める当接面で、各当接面からプラスデックレ
ンズの光軸までの距離はミクロンオーダーの寸法精度で
設定可能である。Ｉｇはプラスチックレンズの成形時に
できたゲートの跡である。[Example] Figures 1 to 3 show a first example of the present invention. Figure 1 is a perspective view of the main parts of the present invention, and Figure 2 is a view of the form in which both elements are combined and seen from the front. As shown, l is a plastic lens, la, l
b and lc are a pair of circular protrusions that are integrally molded with the lens and provided as part of the mounting portion. As shown in FIG. 2, the protrusions 1a, lb, and le arranged on the front and back surfaces of the mounting portion correspond to the insertion direction of the lens, and the distances fLa, lb from the perpendicular line passing through the lens optical axis are 9. The relationship is set so that a<intersects. In addition, ld, le, and if are contact surfaces that at least partially contact the holding member 2 of the lens and determine the vertical and horizontal positions, and the distance from each contact surface to the optical axis of the plus deck lens is on the order of microns. Can be set with dimensional accuracy of Ig is the mark of a gate created during molding of a plastic lens.

２はプラスチックレンズの保持部材で一方向に開いた空
間には突起１　ａ、　ｌ　ｂ＋　　１　ｃと当接面１ｄ
、ｌｅ、ｉｆに当接する支持用平面２ａ。2 is a holding member for a plastic lens, and the space that opens in one direction has protrusions 1a, lb+1c and a contact surface 1d.
, le, if abutting plane 2a.

２ｂ、２ｃ、２ｄ、２ｅ、２ｆを図の様に配置している
。第２図は保持部材２の中にプラスチックレンズｌを挿
入した状態であって、保持部材２の平面図２ｅ、２ｆは
レンズ１の光軸を設計上の光軸に一致させるために作用
し、これら平面から設計上の光軸までの距離１−　、Ｊ
Ｌｂはミクロンオーダーの寸法精度で設定可能である。2b, 2c, 2d, 2e, and 2f are arranged as shown in the figure. FIG. 2 shows a state in which the plastic lens l is inserted into the holding member 2, and the plan views 2e and 2f of the holding member 2 act to align the optical axis of the lens 1 with the designed optical axis. The distance from these planes to the designed optical axis is 1−, J
Lb can be set with dimensional accuracy on the order of microns.

また２ｅは一部上方に行くほど広がっていて挿入の容易
さと楔の効果を得られる。Further, part 2e widens upward in part to facilitate insertion and provide a wedge effect.

第３図は第２図のＡ−Ａ’の縦断面図で、同図において
、プラスチックレンズｌの突起ｉａ、ｌｃの面間隔Ｊｌ
ｔ２及びｌｂとｌｄの面間隔１ｔ３は突起部以外の肉圧
１ｔｌより厚くなつていて、挿入後の安定性を高めてい
る。FIG. 3 is a longitudinal cross-sectional view taken along line A-A' in FIG.
The surface spacing 1t3 between t2 and lb and ld is thicker than the flesh pressure 1tl other than the protruding portion, thereby increasing stability after insertion.

つぎに上記構成において、プラスチックレンズ１を保持
部材２に挿入する場合、ｌ　ｔ２＞ｌｔｌ、１　ｔ３＞
　ｌ　ｔｌの関係より突起１ａ、ｌｂ。Next, in the above configuration, when inserting the plastic lens 1 into the holding member 2, l t2>ltl, 1 t3>
From the relationship of l tl, protrusions 1a and lb.

ｌｃ、と当接面１ｄ、ｌｅ、ｉｆ面は挿入初期にはまだ
保持部材２と接触しておらずスムーズに所定の位置に入
れ込むことが可能である。lc, contact surfaces 1d, le, and if surfaces are not yet in contact with the holding member 2 at the initial stage of insertion, and can be smoothly inserted into a predetermined position.

第４図は変形例を示すもので、第１図の取付部材の突起
１ａ、ｌｂの部位が逆にレンズ周縁より窪んだ形状とな
っている。勿論レンズ保持部材の支持用平面２ａと２ｃ
、２ｂと２ｄの間隔は窪み部１ａ　　　ｌｂ’が嵌合す
る様に縮小されている。FIG. 4 shows a modification in which the projections 1a and lb of the mounting member shown in FIG. 1 are recessed from the lens periphery. Of course, the supporting planes 2a and 2c of the lens holding member
, 2b and 2d are reduced so that the recesses 1a and 1b' fit together.

第５図、第６図は第３の実施例を示した図で、第５図で
３はプラスチックレンズ、３ａ。5 and 6 are diagrams showing the third embodiment, and in FIG. 5, 3 is a plastic lens, 3a.

３ｂ、３ｄはレンズと一体成形された小面積の突起であ
る。これら突起の中心とレンズ光軸な通る垂線からの距
離立ａ、ｌｂは見ａΦｌｂの関係にあるが、第５図のＢ
−Ｂ’断面図を示す第５図で、突起３ａ、３ｂ、３ｃ、
３ｄの高さ交ｔ４．　　文ｔ５．Ｊｌｔ６（４０）　　
　文ｔ７にはｔ　ｔＳ＞ｉｔ４．　ｊｌｔ７．１ｔ６の
関係がある。４はプラスチックレンズ３の保持部材で突
起３　ａ　、　３　ｂ　＊３ｃ当接面３ｄに当接するた
めの支持用平面４ａ、４ｂ、４ｃ、４ｄを持っている。3b and 3d are small-area protrusions integrally molded with the lens. The distances a and lb from the center of these protrusions and the perpendicular line passing through the optical axis of the lens are in the relationship aΦlb, but B in Figure 5
In FIG. 5 showing the -B' cross-sectional view, protrusions 3a, 3b, 3c,
3d height intersection t4. Sentence t5. Jlt6 (40)
In sentence t7, t tS>it4. There is a relationship of jlt7.1t6. Reference numeral 4 denotes a holding member for the plastic lens 3, which has supporting flat surfaces 4a, 4b, 4c, and 4d for abutting against the contact surfaces 3d of the protrusions 3a, 3b*3c.

本例の様に１ａ：ｕｂとすることでプラスチックレンズ
の巾及び保持部材のｌ】が狭くできる。。By setting 1a:ub as in this example, the width of the plastic lens and l] of the holding member can be narrowed. .

［発明の効果］ １　モールドレンズを光軸に垂直な方向から所定の位置
にスムーズに挿入てきる。特に真上から落とし込みが可
能なので自動化に有利である ２　モールドレンズのレンズ有効部外に位置決め手段が
あるのでレンズ成形時にこの部分におこるひけや樹脂の
流れの異常による歪がレンズ面精度に悪影響を起こすこ
とがない。[Effects of the Invention] 1. The molded lens can be smoothly inserted into a predetermined position from a direction perpendicular to the optical axis. In particular, it is advantageous for automation because it can be dropped from directly above.2 Since the positioning means is located outside the effective lens area of the molded lens, distortion caused by sink marks or abnormalities in resin flow that occur in this area during lens molding will have a negative impact on lens surface accuracy. It never happens.

３　モールドレンズの倒れや傾き、見間熱を決定する基
準面に小面積部を使用しているので、寸法管理かしや４
”いと共に成型用の型の修正もしやすく、プラスチック
レンズによる高精度な光学系が実現できる。3. Since a small area is used as a reference surface to determine the tilting and tilting of the molded lens, and the temperature between the lenses, dimensional control and 4.
``In addition to this, it is also easy to modify the mold for molding, and a high-precision optical system using plastic lenses can be realized.

４　保持部材のモールドレンズの挿入部に関しては、金
型構造上１方向に型開きすることができ、単純な構造と
なる。4. Regarding the molded lens insertion part of the holding member, the mold structure allows the mold to be opened in one direction, resulting in a simple structure.

５　千−ルドレンズの突起や当接面は、レンズを精度良
く保持するに足りる位置関係にあるので１分割塁の保持
部材でなくとも、倒れ、傾き、見間熱等を十分保障可能
である。The protrusions and abutting surfaces of the 5,000-meter lens are in a positional relationship sufficient to hold the lens with high precision, so that even if it is not a holding member for a one-piece base, it is possible to sufficiently protect against falling, tilting, heat, etc.

６　突起部を圧入用ダボとして利用する場合、レンズ有
効部への変形等のひずみが少なくてすむ。6. When the protrusion is used as a press-fitting dowel, there is less distortion such as deformation to the effective part of the lens.

７　本実施例ではレンズの屈折面（球面ｏｒ非球面ｏｒ
千面ａｔｅ）を切り欠いていないので面精度が非常に良
く高精度の光学系が実現可能である。7 In this example, the refractive surface of the lens (spherical, aspherical or
Since the 1,000-sided surface is not cut out, the surface precision is very good and a highly accurate optical system can be realized.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の第１の実施例における斜視図。 第２図は第１図の正面図。 第３図は第２図のＡ−Ａ’断面図。 第４図は変形例の要部斜視図。 第５図は本発明の第３の実施例における正面図。 第６図は第４図のＢ−Ｂ’断面図。 １．３はプレスチックレンズ ２．４は保持部材 ｌａ、ｌｂ、ｌｃ、ｌｄは突出部 ｌｅ、Ｉｆ　Ｌｔ接平面 FIG. 1 is a perspective view of a first embodiment of the invention. FIG. 2 is a front view of FIG. 1. FIG. 3 is a sectional view taken along line A-A' in FIG. FIG. 4 is a perspective view of essential parts of a modified example. FIG. 5 is a front view of a third embodiment of the present invention. FIG. 6 is a sectional view taken along line B-B' in FIG. 4. 1.3 is plastic lens 2.4 is the holding member la, lb, lc, ld are protrusions le, If Lt tangent plane

Claims (4)

【特許請求の範囲】[Claims] （１）取付部と共に一体成形されたレンズとレンズを保
持するために取付部と当接するレンズ保持部材とを具え
、取付部はレンズ保持部材と面接触する接平面とレンズ
保持部材に当接する光軸方向に突出もしくは窪んだ当接
部を有することを特徴とする光学装置。(1) A lens that is integrally molded with a mounting part and a lens holding member that comes into contact with the mounting part to hold the lens, and the mounting part has a tangential plane that makes surface contact with the lens holding member and a light that comes into contact with the lens holding member. An optical device characterized by having a contact portion that is protruded or recessed in the axial direction. （２）前記取付部の当接部は、前記レンズ保持部材への
挿入方向と垂直な方向に沿って対を成す様に設けられて
いる特許請求の範囲第１項記載の光学装置。(2) The optical device according to claim 1, wherein the contact portions of the attachment portion are provided in pairs along a direction perpendicular to the direction of insertion into the lens holding member. （３）前記当接部の対の内、前記レンズ保持部材の挿入
方向前方の対の間隔は後側の間隔より小である特許請求
の範囲第２項記載の光学装置。(3) The optical device according to claim 2, wherein of the pair of abutting portions, the distance between the pair on the front side in the insertion direction of the lens holding member is smaller than the distance on the rear side. （４）表裏両方の当接部の頂点間の厚さは、前記レンズ
保持部材の挿入方向前方の厚さより後方の厚さが大であ
る特許請求の範囲第２項記載の光学装置。(4) The optical device according to claim 2, wherein the thickness between the vertices of both the front and back contact portions is greater at the rear than at the front in the insertion direction of the lens holding member.