歷史
1960年至1973年,徠茲（徠卡） [ 1 ]專利陣列和相應(yīng)的自動(dòng)傳感技術(shù).舉行的Photokina 1976年,徠卡相機(jī)提出了一個(gè)他們以前的基礎(chǔ)上發(fā)展,命名Correfot ,并于1978年,他們表現(xiàn)出的單鏡反光相機(jī)的全面運(yùn)作的自動(dòng)對(duì)焦.第一次大規(guī)模生產(chǎn)的自動(dòng)對(duì)焦相機(jī)柯尼卡C35自動(dòng)對(duì)焦,一個(gè)簡(jiǎn)單的拍攝模式,并在1977年公布.寶麗希凱SX - 70是第一個(gè)自動(dòng)對(duì)焦單鏡頭反光照相機(jī),于1978年公布.賓得我,男,該傳感器用于集中在機(jī)身加上機(jī)動(dòng)鏡頭,成為第一個(gè)自動(dòng)對(duì)焦35毫米單鏡反光相機(jī)于1981年.在1983年尼康發(fā)布了F3AF ,他們第一次自動(dòng)對(duì)焦相機(jī),這是基于一個(gè)類似的概念在我氟.在美能達(dá)兼容Maxxum 7000 ,發(fā)布于1985年,是第一個(gè)單鏡反光相機(jī)的綜合自動(dòng)對(duì)焦系統(tǒng),這意味著雙方的自動(dòng)對(duì)焦傳感器和驅(qū)動(dòng)馬達(dá)被安置在了機(jī)身,以及一個(gè)綜合卷片機(jī)-這是成為標(biāo)準(zhǔn)配置為單鏡反光相機(jī)從這個(gè)制造商,因?yàn)樗鼘槟峥?佳能,然而,當(dāng)選為發(fā)展自己的EOS系統(tǒng)的機(jī)動(dòng)鏡片代替.最近,尼康也通過這一戰(zhàn)略的鏡頭AF - S系列鏡頭,其入門級(jí)的數(shù)碼相機(jī)沒有重點(diǎn)電機(jī)在體內(nèi).
積極自動(dòng)
主動(dòng)測(cè)量距離自動(dòng)對(duì)焦系統(tǒng)的主題獨(dú)立的光學(xué)系統(tǒng),并隨后調(diào)整光學(xué)系統(tǒng)的正確的焦點(diǎn).
有各種不同的方法來測(cè)量距離,包括超聲波聲波和紅外光.在第一種情況下,發(fā)出的聲波的攝像頭,通過測(cè)量其反射延遲,距離計(jì)算的主題.寶麗來相機(jī)包括光譜和SX - 70被稱為成功應(yīng)用此系統(tǒng).在后一種情況下,紅外光,通常采用三角距離的主題.緊湊型數(shù)碼相機(jī),包括尼康35TiQD和28TiQD ,佳能AF35M ,和康T2和的T3 ,以及早期攝像機(jī),使用這一系統(tǒng).
一個(gè)例外,這兩個(gè)步驟的辦法是機(jī)械自動(dòng)提供一些enlargers ,它直接調(diào)整鏡頭.11111111好幸苦啊 有一些由于是專業(yè)詞所以有用軟件查啦下
英語翻譯
英語翻譯
History
Between 1960 and 1973,Leitz (Leica)[1] patented an array of autofocus and corresponding sensor technologies.At Photokina 1976,Leica had presented a camera based on their previous development,named Correfot,and in 1978 they displayed an SLR camera with fully operational autofocus.The first mass-produced autofocus camera was the Konica C35 AF,a simple point and shoot model released in 1977.The Polaroid SX-70 was the first autofocus single-lens reflex camera,released in 1978.The Pentax ME-F,which used focus sensors in the camera body coupled with a motorized lens,became the first autofocus 35 mm SLR in 1981.In 1983 Nikon released the F3AF,their first autofocus camera,which was based on a similar concept to the ME-F.The Minolta Maxxum 7000,released in 1985,was the first SLR with an integrated autofocus system,meaning both the AF sensors and the drive motor were housed in the camera body,as well as an integrated film advance winder - which was to become the standard configuration for SLR cameras from this manufacturer,as it would for Nikon.Canon,however,elected to develop their EOS system with motorised lenses instead.More recently,Nikon have also adopted this strategy with their AF-S range of lenses; their entry-level DSLRs do not have a focus motor in the body.
Active autofocus
Active AF systems measure distance to the subject independently of the optical system,and subsequently adjust the optical system for correct focus.
There are various ways to measure distance,including ultrasonic sound waves and infrared light.In the first case,sound waves are emitted from the camera,and by measuring the delay in their reflection,distance to the subject is calculated.Polaroid cameras including the Spectra and SX-70 were known for successfully applying this system.In the latter case,infrared light is usually used to triangulate the distance to the subject.Compact cameras including the Nikon 35TiQD and 28TiQD,the Canon AF35M,and the Contax T2 and T3,as well as early video cameras,used this system.
An exception to the two-step approach is the mechanical autofocus provided in some enlargers,which adjust the lens directly.
History
Between 1960 and 1973,Leitz (Leica)[1] patented an array of autofocus and corresponding sensor technologies.At Photokina 1976,Leica had presented a camera based on their previous development,named Correfot,and in 1978 they displayed an SLR camera with fully operational autofocus.The first mass-produced autofocus camera was the Konica C35 AF,a simple point and shoot model released in 1977.The Polaroid SX-70 was the first autofocus single-lens reflex camera,released in 1978.The Pentax ME-F,which used focus sensors in the camera body coupled with a motorized lens,became the first autofocus 35 mm SLR in 1981.In 1983 Nikon released the F3AF,their first autofocus camera,which was based on a similar concept to the ME-F.The Minolta Maxxum 7000,released in 1985,was the first SLR with an integrated autofocus system,meaning both the AF sensors and the drive motor were housed in the camera body,as well as an integrated film advance winder - which was to become the standard configuration for SLR cameras from this manufacturer,as it would for Nikon.Canon,however,elected to develop their EOS system with motorised lenses instead.More recently,Nikon have also adopted this strategy with their AF-S range of lenses; their entry-level DSLRs do not have a focus motor in the body.
Active autofocus
Active AF systems measure distance to the subject independently of the optical system,and subsequently adjust the optical system for correct focus.
There are various ways to measure distance,including ultrasonic sound waves and infrared light.In the first case,sound waves are emitted from the camera,and by measuring the delay in their reflection,distance to the subject is calculated.Polaroid cameras including the Spectra and SX-70 were known for successfully applying this system.In the latter case,infrared light is usually used to triangulate the distance to the subject.Compact cameras including the Nikon 35TiQD and 28TiQD,the Canon AF35M,and the Contax T2 and T3,as well as early video cameras,used this system.
An exception to the two-step approach is the mechanical autofocus provided in some enlargers,which adjust the lens directly.
其他人氣：775 ℃時(shí)間：2020-04-04 08:34:28
優(yōu)質(zhì)解答
我來回答
類似推薦
猜你喜歡
- 1Mr.Brain 怎么讀
- 2若a+b+c+d=0 且a^3+b^3+c^3+d^3=3 求abc+bcd+cda+dab的值
- 3孔孟論學(xué)前四則的原文是什么?（無錯(cuò)別字）
- 4細(xì)讀文中兩處劃線語句,分別用四字詞詞語表達(dá)母親去世時(shí)作者的心情.
- 5為什么垂直速度方向的力只改變速度的方向?
- 6i heart a baby_____(a.cries b.crying c.cried d.t
- 7Xiao Ming always comes early.改為一般疑問句
- 8why the hell though asian people (to me are cool as hell)
- 9離別可用幾個(gè)詞語來形容
- 10(1-1+2/1)*(1-1+2+3/1)……（1-1+2+3……2011/1）
- 11sin(45+2x)sin(45-2x)=1/4 是怎么化成 sin(45+2x)cos(45+2x)
- 12若“△”是新規(guī)定的某種運(yùn)算符號(hào)，設(shè)x△y=xy+x+y，則2△m=-16中，m的值為_．