JPH11326605A - Condenser lens - Google Patents
Condenser lensInfo
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- JPH11326605A JPH11326605A JP12928698A JP12928698A JPH11326605A JP H11326605 A JPH11326605 A JP H11326605A JP 12928698 A JP12928698 A JP 12928698A JP 12928698 A JP12928698 A JP 12928698A JP H11326605 A JPH11326605 A JP H11326605A
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- lens
- condenser lens
- mold
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、集光レンズに係わ
り、特に太陽光を集光する集光レンズに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser lens, and more particularly to a condenser lens for condensing sunlight.
【０００２】[0002]
【従来の技術】従来、集光レンズとしてフレネルレンズ
を使用していた。一般に、口径比( レンズの有効直径と
焦点距離との比、Ｆナンバーの逆数でレンズの明るさを
表わす) の大きい凸レンズはその肉厚が極めて厚く、重
量が重くなる。従って、凸レンズの表面を同心円で分割
し、レンズの中心部の厚さをレンズの周辺部とほぼ同一
にした薄いレンズで、重量の軽いフレネルレンズが集光
レンズとして広く使われている。2. Description of the Related Art Hitherto, a Fresnel lens has been used as a condenser lens. In general, a convex lens having a large aperture ratio (the ratio of the effective diameter of the lens to the focal length, the reciprocal of the F number representing the brightness of the lens) has a very large wall thickness and a large weight. Therefore, a light-weight Fresnel lens, which is a thin lens in which the surface of a convex lens is divided into concentric circles and the thickness of the central part of the lens is made substantially the same as the peripheral part of the lens, is widely used as a condensing lens.
【０００３】上記のフレネルレンズを作製する方法とし
て、一般に立型精密旋盤にて形状を切削した金型を使用
し、加熱溶融軟化した透明な合成樹脂板に平プレスによ
ってレンズ形状を転写させる方法、押し出し機等により
透明な合成樹脂を溶融させて押し出し、金型ロールにて
エンボスによってレンズ形状を転写する方法、また電離
放射線（紫外線）を透過する透明樹脂板と、レンズ形状
が形成された金型のレンズ形成面とによって規定される
空隙に紫外線硬化型樹脂を充填した後、前記樹脂に前記
透明樹脂板側より紫外線を照射して前記樹脂を硬化さ
せ、前記透明樹脂板と重合接着させることによって、フ
レネルレンズを製造する方法等がある。[0003] As a method of producing the above-mentioned Fresnel lens, there is generally used a method in which a mold whose shape is cut by a vertical precision lathe is used, and the lens shape is transferred to a transparent synthetic resin plate heated and melt-softened by a flat press. A method in which a transparent synthetic resin is melted and extruded by an extruder or the like, and the lens shape is transferred by embossing with a mold roll. Also, a transparent resin plate that transmits ionizing radiation (ultraviolet rays) and a mold in which the lens shape is formed After filling the gap defined by the lens forming surface with an ultraviolet curable resin, the resin is irradiated with ultraviolet rays from the transparent resin plate side to cure the resin, and polymerized and adhered to the transparent resin plate. And a method of manufacturing a Fresnel lens.
【０００４】上記の何れのフレネルレンズの製造方法で
も金型を必要とし、その金型は一般に立型精密旋盤にて
形状を切削される。通常、切削に時間がかかり、フレネ
ルレンズのサイズが大きい場合は、数日も切削に要する
のが一般的である。従って、金型コストがフレネルレン
ズのコストに反映され、必然的に高価なものにになって
しまう問題があった。[0004] In any of the above-described methods for producing a Fresnel lens, a mold is required, and the mold is generally cut by a vertical precision lathe. Usually, it takes a long time to cut, and when the size of the Fresnel lens is large, it generally takes several days to cut. Therefore, there is a problem that the cost of the mold is reflected in the cost of the Fresnel lens, and the cost is inevitably high.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記の課題
を鑑みて考案されたものであり、金型製作時間を短縮で
きるレンズ形状に基づいた、媒体に光を効率よく集める
ことのできる安価な集光レンズを提供することを目的と
する。SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems, and is based on a lens shape capable of shortening a mold manufacturing time. It is an object of the present invention to provide a simple condenser lens.
【０００６】[0006]
【課題を解決するための手段】上記課題は以下の本発明
によって達成される。すなわち、請求項１の発明は、一
定間隔で同心円状に、ある角度でレンズ形状の溝が形成
されている集光レンズにおいて、レンズ中心部と端部の
光学特性が異なることを特徴とする集光レンズである。The above object is achieved by the present invention described below. That is, the invention according to claim 1 is characterized in that, in a condensing lens in which a lens-shaped groove is formed concentrically at a certain interval and at a certain angle, optical characteristics of a lens center portion and an end portion are different. It is an optical lens.
【０００７】請求項２の発明は、請求項１記載の集光レ
ンズにおいて、前記溝の形状がフレネル形状であること
を特徴とする。According to a second aspect of the present invention, in the condensing lens according to the first aspect, the groove has a Fresnel shape.
【０００８】請求項３の発明は、請求項１記載の集光レ
ンズにおいて、前記溝の形状がプリズム形状であること
を特徴とする。According to a third aspect of the present invention, in the condenser lens according to the first aspect, the groove has a prism shape.
【０００９】請求項４の発明は、請求項１乃至３記載の
何れかの集光レンズにおいて、前記レンズ中心部が、レ
ンズ機能を持たないことを特徴とする。According to a fourth aspect of the present invention, in the condenser lens according to any one of the first to third aspects, the central portion of the lens has no lens function.
【００１０】[0010]
【発明の実施の形態】本発明の集光レンズについて図を
参照して詳細に説明する。図１は従来のフレネル型集光
レンズの一例を示した図である。中心から一定間隔で同
心円状に、ある角度でフレネル形状の溝１１が形成され
ているレネル型集光レンズ１０である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A condenser lens according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a view showing an example of a conventional Fresnel type condenser lens. A Fresnel-type condensing lens 10 in which a Fresnel-shaped groove 11 is formed concentrically at a certain interval from the center and at a certain angle.
【００１１】図２は、本発明の一例としてフレネル型集
光レンズを示した図である。図２に基づいて、本発明の
集光レンズを説明する。本発明の集光レンズは、一定間
隔で同心円状に、ある角度でレンズ形状の溝が形成され
ている集光レンズにおいて、中心から所定の中心部領域
Ａと所定の端部領域Ｂの光学特性が異なることを特徴と
し、一例として領域Ａがレンズ機能を持たず、領域Ｂは
所定のレンズ形状の溝２１を有する本発明の集光レンズ
２０を示した。FIG. 2 is a diagram showing a Fresnel condenser lens as an example of the present invention. The condenser lens of the present invention will be described with reference to FIG. The condensing lens of the present invention is a condensing lens in which a lens-shaped groove is formed concentrically at a certain interval and at a certain angle. Are different from each other, for example, the region A has no lens function, and the region B shows the condenser lens 20 of the present invention having a groove 21 having a predetermined lens shape.
【００１２】先ず、フレネル型集光レンズとして、一実
施として屈折率（ｎ）１．５９の透明合成樹脂の材料を
用いて、１２５×１２５ｍｍサイズのセルを有する太陽
電池の集光レンズを作製する場合について図３に基づい
て説明する。１２５×１２５ｍｍサイズの太陽電池セル
４０の対角線の長さが１７６．７６ｍｍであるから、一
例として、フレネルレンズの直径（Ｄ）を２００ｍｍと
すると、下記非球面の式１より、Ｘの値を２００／２
（＝１００）ｍｍにしたときの限界相当曲率（ｒ）を求
めると７７．８ｍｍが得られる。First, as a Fresnel type condenser lens, a condenser lens of a solar cell having cells of 125 × 125 mm size is produced using a transparent synthetic resin material having a refractive index (n) of 1.59 as one embodiment. The case will be described with reference to FIG. Since the length of the diagonal line of the solar cell 40 having a size of 125 × 125 mm is 176.76 mm, as an example, when the diameter (D) of the Fresnel lens is 200 mm, the value of X is 200 according to the following aspherical equation 1. / 2
When the curvature (r) corresponding to the limit at the time of (= 100) mm is obtained, 77.8 mm is obtained.
【００１３】[0013]
【数１】 式１ （但し、ｒは中心の球面半径、ｎはレンズ材質の屈折率
である。）(Equation 1) Equation 1 (where r is the radius of the central spherical surface, and n is the refractive index of the lens material)
【００１４】その時の焦点距離（ｆ）は、一般のレンズ
の式により、１３１．８６ｍｍの値が得られる。The focal length (f) at that time is a value of 131.86 mm according to a general lens equation.
【００１５】以上の結果から、限界相当曲率（ｒ）７
７．８ｍｍ、焦点距離（ｆ）１３１．８６ｍｍの凸レン
ズ形状に基づいて、本発明のフレネル型集光レンズが得
られる。From the above results, it can be seen that the limit equivalent curvature (r) 7
The Fresnel type condenser lens of the present invention is obtained based on a convex lens shape having a focal length (f) of 7.8 mm and a focal length (f) of 131.86 mm.
【００１６】すなわち、同心円集光レンズの中心から６
２．５ｍｍの範囲の領域Ａは非レンズ部で、同心円集光
レンズの中心から６２．５〜１００ｍｍの範囲の領域Ｂ
は上記で得られたレンズ形状を所望の一定間隔のピッチ
の同心円に分割した本発明のフレネル型集光レンズ３０
が得られる。That is, the distance from the center of the concentric lens is 6
A region A in a range of 2.5 mm is a non-lens portion, and a region B in a range of 62.5 to 100 mm from the center of the concentric focusing lens.
Is a Fresnel type condenser lens 30 of the present invention in which the lens shape obtained above is divided into concentric circles having a desired pitch of a constant interval.
Is obtained.
【００１７】上記で得られた集光レンズ３０と太陽電池
セル４０との間の距離（Ｌ）は、下記の式２により、Ｌ
＝３５．９５５が得られる。The distance (L) between the condensing lens 30 and the solar cell 40 obtained above is expressed by the following equation (2).
= 35.955 is obtained.
【００１８】[0018]
【数２】 式２ （但し、Ｄは集光レンズの直径、ｄは太陽電池のセル
幅、ｆは集光レンズの焦点距離を表わす。）(Equation 2) Equation 2 (where D is the diameter of the condenser lens, d is the cell width of the solar cell, and f represents the focal length of the condenser lens)
【００１９】従って、集光レンズ３０と太陽電池セル４
０との間の距離を約５０ｍｍとなる位置に太陽電池セル
４０を配設すれば良い。その時の集光効率（面積比）が
２．０１が得られる。Therefore, the condenser lens 30 and the solar cell 4
The solar battery cell 40 may be provided at a position where the distance between the solar battery cell and the zero is about 50 mm. At that time, a light collection efficiency (area ratio) of 2.01 is obtained.
【００２０】本発明の集光レンズを成形するために、上
記のレンズ形状と逆型の形状を有する金型を作成し、既
に述べたように透明樹脂を用いて平プレス成形方法、押
し出しエンボス成形方法、又は紫外線硬化樹脂等を使用
して型に注入して紫外線を照射して成形する方法等によ
って本発明の集光レンズが得られる。In order to mold the condenser lens of the present invention, a mold having a shape opposite to the above-mentioned lens shape is prepared, and a flat press molding method and an extrusion emboss molding are performed using a transparent resin as described above. The condenser lens of the present invention can be obtained by a method, or a method of injecting into a mold using an ultraviolet curable resin or the like, and irradiating with ultraviolet rays to mold the resin.
【００２１】上記金型は、従来のフレネルレンズは中心
から端部まで中心から一定間隔で同心円状に、ある角度
でフレネル形状の溝が形成されているのに対して、本発
明のフレネル型集光レンズは、中心から所定の中心部領
域Ａと所定の端部領域Ｂを有し、中心から所定の中心部
領域Ａはレンズ機能を持たない非レンズ部であり、この
領域は切削加工の必要がない。従って、金型作製が短時
間で、容易に作製できるために結果的に低価格に集光レ
ンズが得られる。In the above-mentioned mold, the conventional Fresnel lens has a Fresnel-shaped groove formed at a certain angle concentrically from the center to the end at a certain interval from the center, while the Fresnel mold collection of the present invention is formed. The optical lens has a predetermined central region A from the center and a predetermined end region B. The predetermined central region A from the center is a non-lens portion having no lens function, and this region requires cutting. There is no. Therefore, since the mold can be easily manufactured in a short time, a condensing lens can be obtained at low cost.
【００２２】次に、プリズム型集光レンズとして、フレ
ネル型集光レンズの場合と同様、一実施として屈折率
（ｎ）１．５９の透明合成樹脂の材料を用いて、１２５
×１２５ｍｍサイズのセルを有する太陽電池の集光レン
ズを作製する場合について説明する。１２５ｍｍの太陽
電池の対角線の長さが１７６．７６ｍｍであるから、一
例として、フレネルレンズの直径を２００ｍｍとし、プ
リズム角（θ1 ）を５度、即ち、入射角（θ）を８５度
とすると、下記の式３に示したスネルの法則から、出射
角（θ2 ）３８、７９５度が得られ、全出射角（θ3 ）
が４６．２０５度となる。Next, as in the case of the Fresnel-type condenser lens, the prism-type condenser lens is made of a transparent synthetic resin material having a refractive index (n) of 1.59 as one embodiment.
A case of manufacturing a condensing lens of a solar cell having a cell having a size of × 125 mm will be described. Since the diagonal length of a 125 mm solar cell is 176.76 mm, as an example, if the diameter of a Fresnel lens is 200 mm and the prism angle (θ 1 ) is 5 degrees, that is, the incident angle (θ) is 85 degrees. From the Snell's law shown in Equation 3 below, an emission angle (θ 2 ) of 38, 795 degrees is obtained, and the total emission angle (θ 3 )
Is 46.205 degrees.
【００２３】[0023]
【数３】 式３ （但し、θ2 はプリズムでの出射角、θはプリズム入射
角、ｎはプリズムの材質の屈折率を表わす。）(Equation 3) Equation 3 (where θ 2 is the exit angle at the prism, θ is the incident angle of the prism, and n is the refractive index of the material of the prism.)
【００２４】以上の結果から、プリズム角（θ1 ）５
度、即ち、入射角（θ）８５度出射角（θ2 ）３８、７
９５度、全出射角（θ3 ）４６．２０５度のプリズム形
状に基づいて、本発明のプリズム型集光レンズが得られ
る。From the above results, the prism angle (θ 1 ) 5
Degrees, that is, an incident angle (θ) of 85 degrees and an emission angle (θ 2 ) of 38, 7
The prism type condenser lens of the present invention is obtained based on the prism shape of 95 degrees and the total emission angle (θ 3 ) of 46.205 degrees.
【００２５】すなわち、同心円集光レンズの中心から６
２．５ｍｍの範囲の領域Ａは非レンズ部で、同心円集光
レンズの中心から６２．５〜１００ｍｍの範囲の領域Ｂ
は上記で得られたレンズ形状を所望の一定間隔のピッチ
の同心円に分割した本発明のプリズム型集光レンズが得
られる。That is, the distance from the center of the concentric lens is 6
A region A in a range of 2.5 mm is a non-lens portion, and a region B in a range of 62.5 to 100 mm from the center of the concentric focusing lens.
Can obtain the prism type condenser lens of the present invention in which the lens shape obtained above is divided into concentric circles having a desired constant pitch.
【００２６】上記で得られた集光レンズと太陽電池セル
との間の距離（Ｌ）は、下記の式４により求められ、Ｌ
＝３５．９５５ｍｍが得られる。The distance (L) between the condensing lens and the solar cell obtained above is obtained by the following equation (4).
= 35.955 mm.
【００２７】[0027]
【数４】 式４ （但し、Ｌ集光レンズと太陽電池セル間の距離、Ｄは集
光レンズの直径、ｄは太陽電池セルの幅、θ3 はプリズ
ムでの全出射角を表わす。）(Equation 4) Equation 4 (where, the distance between the L condenser lens and the solar cell, D is the diameter of the condenser lens, d is the width of the solar cell, and θ 3 is the total exit angle at the prism.)
【００２８】従って、プリズムレンズから約３６ｍｍと
なる位置に太陽電池セルを配設すれば良い。その時の集
光効率（面積比）が２．０１が得られる。Therefore, it is sufficient to dispose the solar cell at a position approximately 36 mm from the prism lens. At that time, a light collection efficiency (area ratio) of 2.01 is obtained.
【００２９】上記レンズ形状と逆型を有する金型は、従
来のプリズムレンズは中心から端部まで中心から一定間
隔で同心円状に、ある角度でプリズム形状の溝が形成さ
れているのに対して、本発明のプリズム型集光レンズ
は、中心から所定の中心部領域Ａと所定の端部領域Ｂを
有し、中心から所定の中心部領域Ａはレンズ機能を持た
ない非レンズ部であり、この領域は切削加工の必要がな
い。従って、金型作製が短時間で、容易に作製できるた
めに結果的に低価格に集光レンズが得られる。In a mold having a shape opposite to the above lens shape, a conventional prism lens is formed concentrically at a constant interval from the center from the center to an end, and a prism-shaped groove is formed at a certain angle. The prism type condenser lens of the present invention has a predetermined central region A from the center and a predetermined end region B, and the predetermined central region A from the center is a non-lens portion having no lens function. This area does not require cutting. Therefore, since the mold can be easily manufactured in a short time, a condensing lens can be obtained at low cost.
【００３０】[0030]
【発明の効果】以上説明したように、本発明で得られる
集光レンズを使用することで必要最小限の光を集めるこ
とが可能となり、金型作製時間が大幅に短縮され、従っ
てレンズのコストが低減され、低価格の集光レンズを提
供することが可能となった。As described above, by using the condenser lens obtained by the present invention, it is possible to collect the minimum necessary light, and the time required for mold production is greatly reduced. And a low-cost condenser lens can be provided.
【図１】従来のフレネルレンズの一例を示した断面図
（ａ）とフレネルレンズ表面から見た図（ｂ）。FIG. 1A is a sectional view showing an example of a conventional Fresnel lens, and FIG. 1B is a view seen from the surface of the Fresnel lens.
【図２】本発明の集光レンズの一例を示した断面図
（ａ）とフレネルレンズ表面から見た図（ｂ）。FIGS. 2A and 2B are a cross-sectional view showing an example of the condenser lens of the present invention and a view seen from a Fresnel lens surface.
【図３】太陽電池セルを組み合わせた本発明の一実施例
の集光レンズの断面図。FIG. 3 is a cross-sectional view of a condenser lens according to an embodiment of the present invention in which solar cells are combined.
１０、 ２０、 ３０……集光レンズ １１、 ２１、 ３１……レンズ形状溝 ４０……太陽電池セル Ａ……集光レンズのレンズ機能を持たない領域 Ｂ……集光レンズのレンズ機能を有する領域 Ｄ……集光レンズの直径 ｄ……太陽電池セルの幅 ｆ……集光レンズの焦点距離 Ｌ……集光レンズと太陽電池セル間の距離 θ ……入射角 θ1 ……プリズム角 θ2 ……出射角 θ3 ……全出射角10, 20, 30... Condenser lens 11, 21, 31... Lens-shaped groove 40... Solar cell A... Area not having lens function of condenser lens B... Having lens function of condenser lens Area D: diameter of condensing lens d: width of solar cell f: focal length of condensing lens L: distance between condensing lens and solar cell θ: incident angle θ 1: prism angle θ 2 …… Emission angle θ 3 …… Emission angle
Claims (4)
形状の溝が形成されている集光レンズにおいて、レンズ
中心部と端部の光学特性が異なることを特徴とする集光
レンズ。1. A condensing lens in which a lens-shaped groove is formed concentrically at a certain interval and at a certain angle in a lens shape, wherein the optical characteristics of a center portion and an end portion of the lens are different.
特徴とする請求項１記載の集光レンズ。2. A condenser lens according to claim 1, wherein said groove has a Fresnel shape.
特徴とする請求項１記載の集光レンズ。3. The condenser lens according to claim 1, wherein said groove has a prism shape.
いことを特徴とする請求項１乃至３記載の何れかの集光
レンズ。4. The condenser lens according to claim 1, wherein said lens center portion has no lens function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12928698A JPH11326605A (en) | 1998-05-12 | 1998-05-12 | Condenser lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12928698A JPH11326605A (en) | 1998-05-12 | 1998-05-12 | Condenser lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11326605A true JPH11326605A (en) | 1999-11-26 |
Family
ID=15005833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12928698A Pending JPH11326605A (en) | 1998-05-12 | 1998-05-12 | Condenser lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11326605A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100990640B1 (en) | 2008-05-29 | 2010-10-29 | 삼성엘이디 주식회사 | Spread lens and lighting device using it |
| WO2011030858A1 (en) * | 2009-09-11 | 2011-03-17 | ダイキン工業株式会社 | Light-concentrating film, method for producing same, focusing element, solar cell, and focusing method |
| KR101109044B1 (en) | 2009-12-15 | 2012-01-31 | 한국과학기술연구원 | Apparatus for condensing sunlight |
| KR101171006B1 (en) | 2010-08-16 | 2012-08-08 | 한국과학기술연구원 | Greenhouse provided with a film sheet for area focusing of sun light |
| US8296994B2 (en) | 2009-12-15 | 2012-10-30 | Korea Institute Of Science And Technology | Film sheet for area focusing of sun light and greenhouse provided with the same |
| US9977155B2 (en) | 2014-08-25 | 2018-05-22 | Olympus Corporation | Microscope apparatus |
| US10180234B2 (en) | 2014-07-24 | 2019-01-15 | Olympus Corporation | Illumination optical system, illumination apparatus, and illumination optical element |
-
1998
- 1998-05-12 JP JP12928698A patent/JPH11326605A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100990640B1 (en) | 2008-05-29 | 2010-10-29 | 삼성엘이디 주식회사 | Spread lens and lighting device using it |
| WO2011030858A1 (en) * | 2009-09-11 | 2011-03-17 | ダイキン工業株式会社 | Light-concentrating film, method for producing same, focusing element, solar cell, and focusing method |
| EP2477051A1 (en) * | 2009-09-11 | 2012-07-18 | Daikin Industries, Ltd. | Light-concentrating film, method for producing same, focusing element, solar cell, and focusing method |
| JP5287989B2 (en) * | 2009-09-11 | 2013-09-11 | ダイキン工業株式会社 | Condensing film and manufacturing method thereof, condensing element, solar cell, and condensing method |
| EP2477051A4 (en) * | 2009-09-11 | 2014-03-12 | Daikin Ind Ltd | Light-concentrating film, method for producing same, focusing element, solar cell, and focusing method |
| US9176474B2 (en) | 2009-09-11 | 2015-11-03 | Daikin Industries, Ltd. | Light-concentrating film, method for producing same, focusing element, solar cell, and focusing method |
| KR101109044B1 (en) | 2009-12-15 | 2012-01-31 | 한국과학기술연구원 | Apparatus for condensing sunlight |
| US8296994B2 (en) | 2009-12-15 | 2012-10-30 | Korea Institute Of Science And Technology | Film sheet for area focusing of sun light and greenhouse provided with the same |
| KR101171006B1 (en) | 2010-08-16 | 2012-08-08 | 한국과학기술연구원 | Greenhouse provided with a film sheet for area focusing of sun light |
| US10180234B2 (en) | 2014-07-24 | 2019-01-15 | Olympus Corporation | Illumination optical system, illumination apparatus, and illumination optical element |
| US9977155B2 (en) | 2014-08-25 | 2018-05-22 | Olympus Corporation | Microscope apparatus |
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