国产麻豆精品视频-国产麻豆精品免费视频-国产麻豆精品免费密入口-国产麻豆精品高清在线播放-国产麻豆精品hdvideoss-国产麻豆精品

撥號18861759551

你的位置:首頁 > 技術文章 > Advantages of Fresnel Lenses

技術文章

Advantages of Fresnel Lenses

技術文章

Advantages of Fresnel Lenses

Fresnel lenses consist of a series of concentric grooves etched into plastic. Their thin, lightweight construction, availability in small as well as large sizes, and excellent light gathering ability make them useful in a variety of applications.Fresnel lenses are most often used in light gathering applications, such as condenser systems or emitter/detector setups. They can also be used as magnifiers or projection lenses in illumination systems, and image formulation.

A Fresnel (pronounced fray-NEL) lens replaces the curved surface of a conventional optical lens with a series of concentric grooves. These contours act as individual refracting surfaces, bending parallel light rays to a common focal length (Figure 1). As a result, a Fresnel lens, while physically narrow in profile, is capable of focusing light similar to a conventional optical lens but has several advantages over its thicker counterpart.

 

THE THEORY OF FRESNEL LENSES

The driving principle behind the conception of a Fresnel lens is that the direction of propagation of light does not change within a medium (unless scattered). Instead, light rays are only deviated at the surfaces of a medium. As a result, the bulk of the material in the center of a lens serves only to increase the amount of weight and absorption within the system.

 

To take advantage of this physical property, 18th-century physicists began experimenting with the creation of what is known today as a Fresnel lens. At that time, grooves were cut into a piece of glass in order to create annular rings of a curved profile. This curved profile, when extruded, formed a conventional, curved lens – either spherical or aspherical (Figure 2). Due to this similar optical property compared to a conventional optical lens, a Fresnel lens can offer slightly better focusing performance, depending upon the application. In addition, high groove density allows higher quality images, while low groove density yields better efficiency (as needed in light gathering applications). However, it is important to note that when high precision imaging is required, conventional singlet, doublet, or aspheric optical lenses are still best.

MANUFACTURING FRESNEL LENSES

The first Fresnel lenses were made by tediously grinding and polishing glass by hand. Eventually, molten glass was poured into molds, but it was only with the development of optical-quality plastics and injection-molding technology in the 20th-century that the use of Fresnel lenses in many industrial and commercial applications became practical.

 

Fresnel lenses can be manufactured from a variety of substrates. They are manufactured from acrylic to polycarbonate to vinyl, depending on the desired wavelength of operation. Acrylic is the most common substrate due to its high transmittance in the visible and ultraviolet (UV) regions, but polycarbonate is the substrate of choice in harsh environments due to its resistance to impact and high temperature.

 

APPLICATION EXAMPLES

While French physicist Augustin-Jean Fresnel (1788 - 1827) was not the first to conceptualize a Fresnel lens, he was able to popularize it by integrating it into lighthouses. Since then, Fresnel lenses have been utilized in a variety of applications, from light collimation and light collection to magnification.

 

Light Collimation

 

A Fresnel lens can easily collimate a point source by placing it one focal length away from the source. In a finite-conjugate system, the grooved side of the Fresnel lens should face the longer conjugate (Figures 3 - 4) because this produces the best performance.

Figure 3: Light Collimation of a Point Source with a Fresnel Lens

 

Light Collection

 

One of the most common applications for a Fresnel lens is the collection of solar light, which is considered very nearly parallel (an infinite-conjugate system). Using a Fresnel lens for light collection is ideal for concentrating light onto a photovoltaic cell or to heat a surface. For example, a Fresnel lens can be used for popular home maintenance such as heating a home or pool! In these cases, the overall surface area of the lens determines the amount of collected light.

Figure 4: Light Collimation of a Point Source with a Fresnel Lens

 

Magnification

 

Another common application for a Fresnel lens is magnification. It can be used as a magnifier or projection lens; however, due to the high level of distortion, this is not recommended. Also, the image quality does not compare to that of a higher-precision system given the amount of distortion.

 

While commonly found in solar applications, Fresnel lenses are ideal for any application requiring inexpensive, thin, lightweight positive lens elements. Fresnel lenses are not new technology, but their pervasiveness has increased with improvements in manufacturing techniques and materials. Fresnel lenses are truly unique optical lenses which make them a great tool for a range of interesting and fun optical designs.

聯系我們

地址:江蘇省江陰市人民東路1091號1017室 傳真:0510-68836817 Email:sales@rympo.com
24小時在線客服,為您服務!

版權所有 © 2025 江陰韻翔光電技術有限公司 備案號:蘇ICP備16003332號-1 技術支持:化工儀器網 管理登陸 GoogleSitemap

在線咨詢
QQ客服
QQ:17041053
電話咨詢
0510-68836815
關注微信
性啪啪CHINESE东北女人| 欧美、另类亚洲日本一区二区| 少妇精品揄拍高潮少妇| 中文字幕人妻在线中字| 国精品无码一区二区三区左线| 久久亚洲AV无码AV男人的天堂| 卫生间被教官做好爽HH视频 | A∨变态另类天堂无码专区| 妓女妓女一区二区三区在线观看| 上边一面亲下边一面膜的注意事项 | 无码人妻丰满熟妇啪啪| 槽溜2021入口一二三四| 美女露100%双奶头无遮挡图片 | 一边喘气一边说疼的视频| 国产在线精品一区二区中文| 日文中文字幕乱码一二三区别| 做AJ的姿势教程大全图片高清版| 精品深夜AV无码一区二区| 香蕉久久AV一区二区三区APP| 成人亚洲区无码区在线点播| 内射大B美女毛片| 一边下奶一边吃面膜视频| 久久精品影视免费观看| 亚洲AV无码一区二区三区大黄瓜| 国产成人精品综合在线观看| 日本免费AⅤ欧美在线观看| 97精品人妻一区二区三区香蕉| 久久久久久精品免费免费麻辣| 亚洲不卡无码A∨在线| 国产免费人成视频在线播放播 | 久久国产香蕉一区精品蜜桃 | 做AJ的视频大全电视剧| 女教师办公室被强在线播放| 孕交VIDEOSGRATIS乌| 久久九九久精品国产免费直播| 野花日本韩国大全免费观看6| 精品无人区乱码1区2区3区在线| 亚洲人色婷婷成人网站在线观看| 国色天香卡一卡二乱码| 无码人妻黑人中文字幕| JIZZJIZZ免费看国产| 无码人妻毛片丰滿熟婦区毛片色欲 | 国产精品对白刺激久久久 | 亚洲VA久久久噜噜噜久久| 精品国产三级A∨在线| 亚洲AV无码专区亚洲AV桃花桃| 黑人上司好猛我好爽中文字幕 | 一级特黄无码毛片av一区二区| 美女直播全婐网站免费高清| 野花社区在线观看免费直播WWW| 秘书在办公室被躁到高潮| GOGO全球高清专业大尺度摄影| 女人被狂C到高潮视频网站| おやすみせくよ晚安免费影院| 欧美最猛性XXXXX黑人巨| H精品无码动漫在线观看| 日韩一区无码视频| 国产女人喷潮视频免费| 西西人体大胆WWW444| 精品浪潮av一区二区三区| 亚洲色精品88色婷婷七月丁香| 精品国产一区二区三区免费| 永久黄网站色视频免费品善网 | 18禁黄网站男男禁片免费观看| 美女浴室洗澡裸体爆乳无遮挡| FREE性满足VIDE0SHD| 少妇特黄Av一区二区三区| 国产SUV精品一区二区69| 无卡无码无免费毛片| 精品国产乱码久久久软件下载| 岳妇伦丰满69ⅩⅩ| 人人人澡人人人妻人人人精品| 超碰97人人做人人爱可以下载| 无码丰满人妻熟妇区| 国产亚洲AV手机在线观看| 亚洲AV成人综合网成人| 精品久久久久久久国产潘金莲| 竹菊影视欧美日韩一区二区三区四| 人人妻人人澡人人| 国产99视频精品免费视看6| 无码A级毛片视频| 久久99国产精品久久99蜜桃 | 补课老师让我爽了一夜| 僧侣と交わる色欲の夜に| 黑人性狂欢在线播放| √天堂资源BT在线官网| 全部免费特黄特色大片| 厨房掀起少妇裙子挺进去| 铜铜铜铜铜铜铜铜好大好深黄| 国产亚洲曝欧美不卡精品| 又大又粗又爽的少妇免费视频| 欧美VPSWINDOWS另类| 国产精品久久精品国产| 亚洲国产婷婷香蕉久久久久久| 久久亚洲AV无码AV男人的天堂| 成人国产欧美大片一区| 无码人妻丰满热妇又大又粗 | 中文成人无码精品久久久不卡免费| 欧美丰满少妇人妻精品| 村长压在小雪身上耕耘视频 | 99热这里只有精品免费播放| 翁止熄痒苏钥第9章的内容| 久久无码中文字幕免费影院| 99精产国电影品一二三产区区别| 日本熟妇人妻XXXXX视频| 国产精品精华液网站| 永久黄网站色视频免费品善网 | 狠狠色丁香久久婷婷综| JAVA强行VIDEOS另类| 亚洲AV片无码久久尤物| 欧美日韩中文国产一区| 国产AV剧情MD精品麻豆| 医院人妻闷声隔着帘子被中出| 色综合久色AⅤ网| 极品少妇被猛得白浆直流草莓视频| BT天堂网.WWW在线资源| 无码精品A∨在线观看中文| 麻花传媒MV一二三区别在哪里| 国产刺激一区二区| 亚洲香蕉成人AV网站在线观看| 欧美人与牲动交a欧美精品| 国产成人精品A∨一区二区| 亚洲国产精品无码久久 | 娇小VIDEOS出血| 成人国产精品一区二区网站公司| 亚洲少妇吃奶摸下| 丝袜灬啊灬快灬高潮了视频| 精品人妻系列无码人妻免费视频| 成年无码动漫AV片在线尤物| 野花香电视剧全集免费观看高清| 天堂影院一区二区三区四区 | 99精产国品一二三产| 亚洲AV永久无码精品秋霞电影影| 日本19禁啪啪无遮挡免费| 久久精品中文闷骚内射| 国产旡码高清一区二区三区 | 性猛交富婆Ⅹ×××乱大交| 欧美整片欧洲熟妇色视频| 久久AV无码精品人妻糸列| 拔萝卜影视剧免费观看| 亚洲成AⅤ人片久青草影院 | 国产啪精品视频网站免费| きょこんきょうしゃ在线| 亚洲中文字幕日产无码| 日日摸夜夜添夜夜添影院| 麻豆人妻无码性色AV专区| 国内精品久久久久久久COENT| 成人免费无遮挡无码黄漫视频| 在线观看特色大片免费视频| 亚洲AV涩涩涩成人网站在线播放| 日韩A级无码免费视频| 久久99精品久久久久麻豆| 国产精品岛国久久久久| 波多野结衣与黑人AV| 中文字幕日本最新乱码视频| 亚洲AV无码精品色午夜蜜芽| 強暴強姦AV正片一区二区| 精二和精三的区别| 国产电影在免费播放在线观看| JAVAPARSERHD高潮| 欲色欲色天天天WWW| 亚洲国产精品久久久久久无码| 日本少妇人妻XXXXⅩ18欧美| 美区APPSTORE精品| 久久996RE热这里有精品| 国产精品无码免费专区午夜| 99久久国产综合精品成人影院| 亚洲日韩精品一区二区三区| 校园H学长含着粉嫩小奶| 色婷婷婷亚洲综合丁香五月| 麻豆国产AV丝袜白领传媒| 国产人与禽ZOZ0性伦| 动漫高H纯肉无码视频在线观看| 伊人色综合网一区二区三区| 亚洲国产精品一区二区第四页 | 亚洲国产精品久久久久秋霞小| 乌鸦传媒一二三区| 日韩一区国产二区欧美三区| 欧美最猛黑人XXXⅩ猛男视频| 美国MACBOOKPRO日本| 久久九九精品99国产精品| 狠狠色噜噜狠狠狠狠色综合久| 国产精品一亚洲AV日韩AV欧| ぱらだいす天堂中文网WWW | 无人区码一码二码三码在线| 欧美在线视频二区| 男人强撕开奶罩揉捏我奶头视频| 久久久噜噜噜久久| 国产欧美成AⅤ人高清| 国产成人精品一区二三区在线观看| 唱歌的大姐姐也想做| XXXX内射美国老太太| 幼儿免费网站精品幼儿1| 亚洲熟妇成人精品一区| 亚洲国产精品无码久久98| 亚洲AV日韩AV高潮喷潮无码天| 无码中文亚洲AV影音先锋无码| 天天摸日日添狠狠添婷婷| 少妇系列之白嫩人妻| 色悠久久久久综合欧美99|