برد دید در شب دوربین مداربسته چه قدر است؟

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اصطلاح IR Range به معنی برد نور IR است. در دوربین مداربسته از نور مادون قرمز IR برای تصویربرداری در شب استفاده می شود. این نور توسط ال ای دی های IR نصب شده در دوربین تامین می شود. این نور در مدل های مختلف دوربین مداربسته دارای برد تابش متفاوتی است. به همین دلیل برد دید در شب دوربین مداربسته در مدل های مختلف، متفاوت است.

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دید در شب مادون یا IR قرمز یعنی چه؟

روند تشکیل تصویر در دوربین مداربسته به صورت کلی این است که دوربین نوری را که از روی اجسام مختلف در محیط منعکس شده، دریافت می کند. بنابراین با استفاده از نور منعکس شده تصویر می سازد. این روند کاملا مشابه کارکرد چشم انسان است. همه ما با این عملکرد آشنا هستیم و به خوبی می دانیم که وقتی نوری در محیط وجود نداشته باشد تصویری هم نداریم. راه حل رفع این مشکل بسیار ساده است، کافیست در محیط های تاریک چراغی روشن کنیم تا محیط روشن شود و بعد تصویری از محیط داشته باشیم.

اما مشکل اینجاست که به دلایل امنیتی، روشن کردن محیط با نور سفید راه حل خوبی نیست. برای رفع این مشکل به جای نور مرئی از نور مادون قرمز برای روشن کردن محیط استفاده می شود. این نور هر دو مشکل ما را برطرف می کند. از طرفی نور مادون قرمز هم مانند نور مرئی می تواند به تشکیل تصویر کمک کند. از طرف دیگر این نور برای انسان مرئی نیست (پس ما محیط را همچنان تاریک می بینیم). ساختار چراغ های مادون قرمز تا حد زیادی مشابه چراغ های معمولی است. با این تفاوت که نور تولیدی آنها از طیف فرکانسی دیگری است.

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برد دید در شب دوربین مداربسته به چه عواملی وابسته است؟

فاصله ای که دوربین دید در شب می تواند اشیا را در تاریکی شب به خوبی تشخیص دهد؛ به دو عامل زیر بستگی دارد:

1.اقدرت نوری LEDهای مادون قرمز :

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طبیعتا هرچه LED های مادون قرمز روی دوربین قوی تر باشند نور بیشتری تولید می کنند و محیط را بیشتر روشن می کنند و برد دید دوربین در شب افزایش می یابد.

2. میزان حساسیت چیپ تصویر به نور IR :

از طرف دیگر هرچه چیپ تصویر دوربین به نور IR حساس‌تر باشد، به نور کمتری برای تولید تصویر نیاز دارد. پس افزایش حساسیت چیپ تصویر به نور IR هم می‌تواند برد دید در شب دوربین را افزایش دهد.

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حداقل نور مورد نیاز دوربین مداربسته دید در شب

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حداقل میزان نور مورد نیاز دوربین مدار بسته دید در شب جهت تصویربرداری در دوربینهای مختلف متفاوت است. اگر قصد مشاهده یک محیط کاملا تاریک را دارید باید دوربینی انتخاب کنید که حداقل نور مادون قرمز را نیاز داشته باشد.

خوشبختانه بهترین برندهای دوربین مداربسته مثل هایک ویژن، دوربین هایی با حساسیت به نور متفاوتی را تولید کرده است. بنابراین می توانید با توجه به نیازتان دوربینتان را انتخاب کنید.

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برد دید در شب دوربین های مداربسته هایک ویژن چقدر است؟

با توجه به ساده بودن ساختار دید در شب IR امروزه تقریبا تمام دوربین های هایک ویژن مجهز به این قابلیت هستند. هایک ویژن دوربین هایی با دید در شب از 10 متر تا 500 متر تولید می کند. بسته به نوع کاربری، شما می توانید دوربینی با مشخصات مناسب را انتخاب کنید.

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مزایای دوربین مدار بسته IR

هزینه کم: از آنجایی که هزینه تولید دوربین دید در شب بالا نیست، اکثر دوربینهای مداربسته دارای قابلیت IR هستند.
امکان نظارت محیط های تاریک: دوربینهای IR به نور مرئی نیاز ندارند و با جذب مادون قرمز می توانند در محیط تاریک تصویر ضبط کنند.
سادگی: دوربین دید در شبها اصلا تکنولژی پیچیده ای ندارند. تنها مجهز به چراغ LED هستند که هزینه بر هم نیست.

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اصطلاح IR Cut چیست؟

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IR Cut در دوربین مداربسته در واقع نام نوعی فیلتر است. فیلتر IR CUT از ورود امواج مادون قرمز در طول روز به دوربین جلوگیری می کند. بنابراین دوربین در روز از نور مرئی استفاده می کند تا کیفیت تصاویر تغیر نکند. با تاریک شدن محیط نیز بخش مادون قرمز دوربین فعال می شود.

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دید در شب EXIR چیست؟

دید در شب EXIR جدیدترین تکنولوژی هایک ویژن است که عملکرد بسیار قوی تری نسبت به دید در شب IR دارد. دوربین های مجهز به تکنولوژی EXIR هایک ویژن کارایی بالایی در نور کم، چه در محیط های داخلی و چه در محیط های خارجی دارند. دید در شب EXIR، از جمله پیشرفته ترین تجهیزات نظارتی شبانه در بازار محسوب می گردند.

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مقالات مرتبط

نمایندگی هایک ویژن

پیشنهاد می کنیم به دلیل متنوع بودن دوربین های مداربسته و جلوگیری از سردرگمی جهت انتخاب دوربین IR با نمایندگی هایک ویژن تماس بگیرید:

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021-52605

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