Posts Tagged ‘ sensor chip’



Hidden Camera Equipment

Written By:
Tuesday, September 6th, 2011

Security Camera King has a full selection of hidden camera equipment to satisfy your needs.  Modern technology has resulted in a tremendous variety of disguised and hidden camera equipment.  As a matter of fact, the smallest hidden camera that we offer for sale is the size of a Phillips head screw!

How does hidden camera equipment work?  The following is a brief explanation.

First the camera must have a lens.  The lens’s duty is to gather the light reflected by the objects in its field of view and focus them onto a sensor chip no larger than 1/4 to 1/3 inches square.  Most often but not always, hidden cameras use 3.7 mm wide angle lenses.

The sensor chip is the key factor of a digital camera.  There are two different types of sensor chips and although they both work a little differently, the both produce the same result, electrical impulses that can be measured and used to create a digital video image.

The two sensor types that do this are either the Charged Coupled Device or CCD or the Complementary Metal Oxide Semiconductor or CMOS.  Without at least one of these sensors, the camera just wouldn’t be possible.  You can see that since the lens and sensor chips are so small they can easily be packaged in such a way that no one would suspect the hidden camera.

However, there are some electronic components that are required but these are normally wired in small Integrated Circuit (IC) chips which take up very little space.  One of these chips is an analog to digital converter.  Ironically the signal up to this point has been an analog signal and the analog to digital converter changes it to full binary or digital data.

Once the data has been finalized it is sent to the Digital Video Recorder or DVR.  The DVR differs depending on the type of camera.  Some cameras are hardwired to the DVR via a coaxial video transmission cable and others have their own on-board miniature DVRs that normally save their information to either on-board memory or portable media such as SD cards, Thumb flash drives, and the like.  The latter case allows for complete independence (and makes for great hidden camera equipment) for the camera; in other words it is self-contained and needs no wiring.  These units also usually operate on one-time-use or rechargeable batteries

So, with the above in consideration we can categorize hidden cameras and hidden camera equipment into two different categories.  One where the camera is wired through to a digital video system’s DVR; and standalone (and usually portable) self-contained units.

Security Camera King offers a full line of hidden camera equipment including the two categories mentioned above.  It would be a bit tedious to mention any properties or features of these cameras in the space that we have in this article.  But to make you aware of the vast supply Security Camera King has, we will list the different cameras that are available representing both categories we have previously mentioned.

Hidden Security Cameras

  • 420 TVL Motion Detector
  • 420 TVL Smoke Detector
  • 420 TVL Mirror
  • 420 Pinhole Security Camera
  • Fire Ceiling Sprinkler
  • Hidden Stick
  • Hidden Pen
  • Wired Button Camera with extra matching buttons
  • Phillips screw head
  • Hidden Wristwatch Camera
  • Desktop Speakers
  • Exit Sign
  • Wall Clock
  • Wired Alarm Clock
  • Wired Wall Clock with Humidity and Temp
  • Wired Cordless House Phone
  • Suspended Animation Clock
  • CD/Boombox
  • Wired Emergency Light
  • Wired Thermostat

Wireless Hidden Cameras

These cameras transmit their video data via an on-board transmitter to a corresponding receiver.

  • Button
  • Screw
  • Baby Monitor Stuffed Puppy
  • Motion Detector
  • Wall Clock
  • Exit Sign
  • Desktop Speakers
  • Vanity Mirror
  • Carbon Monoxide Detector
  • Wind Tunnel Fan
  • CD/BoomBox
  • Utility Box
  • Air Wick Air Freshner
  • Tissue Box
  • Smoke Detector
  • Emergency Light
  • Wall mirror

Hidden Camera Systems

  • Portable Cigarette Lighter
  • Mini Desk Clock
  • Sunglasses
  • Key Chain
  • Small or Large Spot Light
  • Motion Detector
  • Rearview Mirror
  • Electrical Outlet
  • Air Freshner
  • Air Purifier
  • Exit SIgn
  • Wall Clock
  • Alarm Clock
  • Boombox
  • Desk Lamp

Check out Security Camera Kings hidden camera equipment Web pages for more information or contact one of our security experts if you have any questions.

 

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Digital Security Cameras

Written By:
Friday, September 2nd, 2011

Almost all the security cameras these days are digital security cameras.  Compared to their old analog equivalents, they are lighter, more efficient, use less electricity, and just about anyone can install them.

Digital security cameras are a small-package of technological wonders from the lens to the video transmission type it uses.  In addition, digital security cameras get to “piggy back” on the personal computer industry; that is many times a device is advanced technologically for a computer; the digital security camera industry can reap the benefit of the advance as well.

In the following article, we’ll give you a brief overview of how a digital security camera actually works.  This should give you a better working knowledge so if you are considering a purchase you can make a wise one.

The digital security camera starts with a highly refined lens.   The lens has the responsibility of gathering the light reflected off objects in its field of vision and transferring the light images (with great detail), and small enough to be focused on a 1/4 inch square sensor chip.  The sensor chip is sensitive to light and emits tiny electrical impulse when exposed to light.

One of two different kinds of sensor chip is used in digital security cameras.  The Charged Coupled Device or CCD and the Complementary Metal Oxide Semiconductor or CMOS.   Although they go about it in different ways, the both produce the same end result; that is, electrical impulses that can be used to create a digital video image.

The digital security camera is actually nothing more than a very fast photographic camera.  It takes pictures at the rate of up to 30 pictures (called “frames) per second or denoted as 30 fps.  Playing back these pictures at the same speed they were taken gives the human brain the illusion that they are watching animation.  Actually, depending on many factors, rates as low as 15 fps can produce fluid animated video.

After each “picture” is taken that data is hurried along to an Integrated Circuit (IC) chip that is designed to correct for imbalances in many features of electronic video such as brightness, hue, color saturation, etc.  These specialized IC chips are called Digital Signal Processors or DSPs.  In addition up to this point the signals have actually been analog signals and it is here that they are converted into binary or digital form.

Once the cameras signals have been processed and digitized, they must be sent to the DVR for further action.  This is usually done via a video transmission cable, RG59 for example.

The DVR has many responsibilities including receiving the video transmission, saving it on a Hard Disk Drive or other non-volatile storage medium, and broad casting the signal to the Internet (if so desired) or a local monitor for live monitoring.

Don’t underestimate the power of the DVR and digital security cameras.  The DVR has a lot of simultaneous work that must be done.  Consider this; the digital security camera takes 30 pictures a second.  Let’s say for medium to high quality each picture taken ends up being about 1 MB in size.  Multiply that megabyte by 30 (the number taken in one second) now multiply that number by 60 (the number of seconds in a minute), and finally by 60, the number of minutes in one hour.   That means that an hour of security video imagery would be approximately 108,000 megabytes or 108 gigabytes!

To maintain quality but reduce the size of the video file, the DVR uses a CODEC utility which shrinks the size of the file but maintains as much quality as possible while doing this.   All of Security Camera King’s DVRs utilize the latest most efficient CODEC called H.264

So, as you can see there is a lot of work that goes on behind the scenes when using digital security cameras.  But even so, the versatility, price, application, functionality, and overall quality of the digital security camera is still much farther ahead that it’s older counterpart, the analog security camera.

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