موسوعة الاختراعات ( 17 ) التلفزيون

التلفزيون

في عام 1875 قاد اكتشاف التلفزيون أحد المخترعين في الولايات المتحدة والمدعو ( ج.ر.كاري ) لصنع أول نظام تلفيزيوني بدائي خشن ، مستخدما ً الخلايا الكهربائية الضوئية ،

إذ حالما كان يسلط الضوء على مشهد أو أي جسم من خلال عدسة إلى عدد من الخلايا الكهربائية الضوئية ، فإن كل خلية كانت تسيطر على كمية من الكهرباء تستطيع تمريرها إلى مصباح ضوئي.

عندما تظهر معالم تقريبية لذلك الجسم الذي عرض في الخلايا الكهربائية الضوئية وذلك في الأضواء المسلطة على مجموعة من المصابيح ، وكانت الخطوة التالية اختراع قرص الفحص في عام 1884 على يد بول نيبكو Nipkow  

وكان هذا عبارة عن قرص ذي ثقوب يدور أمام الخلايا الكهربائية الضوئية وقرص آخر يدور أمام الشخص المراقب ولكن المبدأ كان نفس مبدأ ( كاري ).

وفي عام 1923 حدث أول بث للصور بواسطة الأسلاك وقد تم هذا على يد شخص يدعى ( بيرد ) في إنكلترا وشخص يدعى جنكنز في الولايات المتحدة ، وبعدها حدثت عدة تحسينات في كاميرات التلفاز

فقد اخترع فلاديمير ، ( زوريكين ) و ( فيبيو فارنسورث ) كلاهما نوعا ً من الكاميرا يدعى Inconoscpe  ونوعا ً آخر يدعى ( مشرح الصورة ).

وفي عام 1945 استبدلت كلتا هاتين الكاميرتين بجهاز يسمى مصحح أو مقوم الصورة.

وفي هذه الأيام تستعمل أجهزة التلفاز الحديثة أنبوبا ً للصور يدعى أنبوب الأشعة السالبة Cathode  وفي هذا الأنبوب هناك نوع من البندقية الكهربائية التي تقسم الشاشة بنفس الطريقة التي يسلكها الشعاع الضوئي في أنبوب الكاميرا ليساعدنا في رؤية الضوء.

تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Screenshot_2020-04-08-thumb2-water-drops-texture-4k-black-background-water-drops-water-backgrounds-jpg-صورة-JPEG،-710×444-....png

المراجع :

تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Screenshot_2020-04-08-thumb2-water-drops-texture-4k-black-background-water-drops-water-backgrounds-jpg-صورة-JPEG،-710×444-....png
تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Screenshot_2020-04-08-thumb2-water-drops-texture-4k-black-background-water-drops-water-backgrounds-jpg-صورة-JPEG،-710×444-....png

جزيرة الأمل || Hope island

48 ردّ على “موسوعة الاختراعات ( 17 ) التلفزيون”

  1. I simply had to say thanks again. I’m not certain the things
    I would have sorted out without the entire techniques documented by you on this problem.
    It truly was the intimidating scenario for me personally, nevertheless taking note of this specialized tactic you treated it made me to leap for contentment.

    Now i am grateful for your information as well
    as hope that you know what a great job you have been getting into instructing people
    through your blog. I’m certain you haven’t got
    to know any of us.

    Also visit my website; Cool Portable AC Reviews

  2. The other day, while I was at work, my cousin stole my apple ipad and tested to
    see if it can survive a 30 foot drop, just so she can be a youtube sensation. My apple
    ipad is now broken and she has 83 views. I know this is completely
    off topic but I had to share it with someone!

  3. Wonderful goods from you, man. I have understand your stuff previous to and you’re just extremely fantastic.
    I really like what you’ve acquired here, really like what you are saying and the way in which you say it.

    You make it entertaining and you still take care of to keep it wise.
    I can not wait to read much more from you. This is actually a terrific web site.

  4. Unquestionably believe that that you said. Your favorite justification appeared
    to be at the internet the simplest factor to be mindful of.
    I say to you, I definitely get irked even as people think about concerns that they
    plainly do not understand about. You managed to hit the nail upon the highest and also outlined out the whole thing without having side effect , other people could take a signal.
    Will probably be again to get more. Thank you!

    My web site … Leaf Max CBD Reviews

  5. Howdy I am so happy I found your site, I really found
    you by mistake, while I was looking on Google for something else, Regardless I am here now and would just like to say many thanks for a
    fantastic post and a all round exciting blog (I
    also love the theme/design), I don’t have time to
    read it all at the minute but I have book-marked it and also included your RSS feeds, so when I have time I will be back to read a lot more, Please do keep up the excellent work.

    Feel free to surf to my web-site; Solvolt Charger

  6. I would like to convey my affection for your generosity supporting folks that need help
    on this theme. Your personal dedication to getting the message around came to be especially important and have truly
    allowed ladies much like me to arrive at their ambitions.
    The warm and friendly guide entails much to me and especially to
    my office colleagues. Thank you; from everyone of us.

    Here is my web page: Silvia

  7. Howdy just wanted to give you a quick heads up.
    The words in your content seem to be running off the screen in Firefox.

    I’m not sure if this is a format issue or something to do with web browser compatibility
    but I figured I’d post to let you know. The layout look
    great though! Hope you get the problem fixed
    soon. Cheers

  8. May I simply just say what a comfort to discover
    an individual who really knows what they’re talking about on the internet.
    You definitely understand how to bring an issue to light and
    make it important. A lot more people really need to read this and understand this side of the story.
    I can’t believe you’re not more popular given that you definitely have
    the gift.

    Look at my web blog – PeakFlow

  9. hello there and thank you for your info ? I have definitely
    picked up anything new from right here. I did however expertise some technical issues using this website, as
    I experienced to reload the web site many times previous to I could get
    it to load correctly. I had been wondering if your web
    hosting is OK? Not that I’m complaining, but slow loading instances times will
    sometimes affect your placement in google and can damage your quality score if advertising and marketing with Adwords.

    Anyway I am adding this RSS to my email and
    can look out for a lot more of your respective
    exciting content. Ensure that you update this
    again soon..

    Visit my homepage … forum.m2clasic.ro

اترك تعليقاً

لن يتم نشر عنوان بريدك الإلكتروني. الحقول الإلزامية مشار إليها بـ *