Technical topics about Remote Control Laser Pointer

   Types of laser pointer



   PowerPoint Presentation Remote Control Laser pointer (RC Laser Pointer)

   How Remote Controls  (RC) work? The Distinction between Infared and RF

   Optional Extra Functions of Remote Control Laser Pointer

   How to use RC Laser Pointer                                       

                                                                                                                                                                  Read more topics about any other usb products...  

Types of laser pointer
The laser pointers usually use a deep red laser diode near the 670/650 nanometer (nm) wavelength. Other colors are possible too, with the 532 nm green laser being the most common alternative. In the past few years, yellow-orange laser pointers, at 593.5 nm, have been made available.In September 2005, handheld blue laser pointers at 473 nm have also become available.
The apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the color response of the human eye. For the same optical power, the green laser will seem brighter than other colors because the human eye is most sensitive in the green area of spectrum (for low light levels), with sensitivity decreasing as colors become redder or bluer.
The output power of a laser pointer is measured in milliwatts (mW). In Europe/UK the legal requirement is that laser pointer output not exceed 1 mW; in USA this output is limited to 5 mW for presentation lasers.  

Laser pointers are often used in school and business presentat
ions and visual demonstrations as an eye-catching pointing device. Red laser pointers can be used in almost any indoor or low-light situation where pointing out details by hand may be inconvenient, such as in construction work or interior decorating. Green laser pointers can be used for similar purposes as well as outdoors in daylight or for longer distances.

Laser pointers can be used as toys for pets, especially for cats in play. Some offer a selection of designs for the laser beam to project (e.g. images of butterflies, mice, or flowers), to provide variety. Opinions are divided on the safety of laser pointers used in this way. Some consider laser pointers to be a healthier alternative to the more traditional string for cats because they reduce the risk of choking on the string. Others are concerned that the laser beam may damage pets' eyes, or that the pet will develop frustration problems from not being able to catch the prey. [6]
Laser pointers do not function as laser sights, although they may appear to be similar to sighting lasers at first impression.
Green laser pointers can also be used for skygazing. On a moonless night, a green laser pointer beam can often be clearly seen, allowing someone to accurately point out individual stars to others nearby.


Laser pointers should never be directed into the eyes of a person or animal or into any moving vehicle in which the driver or pilot could be distracted. The output of laser pointers is generally limited to 1 mW or 5 mW in order to prevent accidental damage to the retina of human eyes.


PowerPoint Presentation Remote Control Laser pointer (RC Laser Pointer)
Whether you are in sales or training or just need to provide professional presentations, the PowerPoint Remote control Presenter(which is also called rc laser pen, remote control presenter, presentation pen, RC laser indicator, etc) will give you an easy way to transition slides. RC Laser Pointer is a USB device all kinds of RC laser pointer or presentation pen(IR, RF)that allows you to control computer-based presentations (for example, PowerPoint) without having to stand at the keyboard. It requires no software installation - simply plug it into a USB port on a PC or Mac, and it works within seconds. It has been successfully tested on both PCs & Macs in shared teaching spaces. It is the perfect tool if you are supporting your teaching with multimedia presentations in the lecture theatre or eSeminar room.

 Lecturers already using this tool have found that it liberates them from having to stand right next to the lectern or presentation table. This tool will make it possible for you to move around the teaching space, which will add variety and interest to your presentation. Your audience will thank you for it!
   --Advance slides with a touch of a button. Up to 15~20m range, Infrared technology or Radio Frequency technology.

--Technology for wireless control.

--Buttons -there are 3 or 4 buttons on the laser pen which control the function of Forward, Back, laser

 pointer, or Blank Screen

--USB compatible

--Plug and play ?no software to load

--Compatible with Windows 95, 98, NT, 2000, XP and higher, MAC OS 8 or higher
Use with *.ppt, *.doc, *.pdf, *.html,*.jpg and otherand any other files.

 this rc laser pointer is widely used by:

  •  Executives

  •  Sales People

  •  Educators

  •  Trainers

  •  Marketing

  •  Real Estate

  •  Human Resources

  •  ANY ONE who gives presentations!


How Remote Controls  (RC) work? The Distinction between Infared and RF


 > Infrared Remote Controls

The dominant remote-control technology in computer USB applications is infrared (IR). Infrared light is also known as plain-old "heat." The basic premise at work in an IR remote control is the use of light to carry signals between a remote control(Laser pen, also is a signal transmitter) and the device it's directing. Infrared light is in the invisible portion of the electromagnetic spectrum.
   An IR remote control (the transmitter) sends out pulses of infrared light that represent specific binary codes. These binary codes correspond to commands, such as PageDown/Up and Blank Screen. The IR receiver decodes the pulses of light into the binary data (ones and zeroes) that the device's microprocessor can understand. The microprocessor then carries out the corresponding command to the computer by USB port, the nest step is the computer process the command from the receiver.
   The basic parts involved in sending an IR signal include:
      •Integrated circuit
      •Button contacts
      •Light-emitting diode (LED)

When the infrared receiver of the RC laser pointer picks up the signal from the transmitter (Laser pen) and verifies from the address code that it's supposed to carry out this command, it converts the light pulses back into the electrical signal for e.g. 001 0010. It then passes this signal to the microprocessor, which goes about "PageDown". The "PageUp" command tells the microprocessor it can excute PageDown.
Infrared remote controls work well enough to have stuck around for many years, but they do have some limitations related to the nature of infrared light. First, infrared remotes have a range of only about 20 meters, and they require line-of-sight. This means the infrared signal won't transmit through walls or around corners -- you need an angle scope between the straight line to the device you're trying to control and the direction of of the infrared ray, certainly, if your are in a room with good conditions of infrared reflection, sometime, no angle required. Also, to avoid interference caused by other sources of infrared light, the infrared receiver of the RC laser pointer only responds to a particular wavelength of infrared light, usually a certain wave length, the light from an IR remote control (laser pen) is typically modulated to a frequency not present in sunlight, and the receiver only responds to  the certain wave length light modulated to that frequency.
While infrared remotes are the dominant technology in computer USB applications.

> Radio Frenquency Remote Controls

Radio-frequency (RF) remote controls are very common. they're still pretty rare in computer USB devices, but you will find RF remotes controlling certain satellite-TV receivers and high-end stereo systems. You'll also find Bluetooth-based remotes that control laptops and smartphones.
Instead of sending out light signals, an RF remote transmits radio waves that correspond to the binary command for the button you're pushing. A radio singal receiver of the RF laser pointer receives the signal and decodes it. The problem with RF remotes is the sheer number of radio signals flying through the air at any given time. Cell phones, walkie-talkies, WiFi setups and cordless phones are all transmitting radio signals at varying frequencies. RF remotes address the interference issue by transmitting at specific radio frequencies and by embedding digital address codes in the radio signal. This lets the radio receiver on the intended device know when to respond to the signal and when to ignore it.
The greatest advantage to radio-frequency remotes is that radio signals can go through walls, but meanwhile, the signal of RF sometimes interfere with any other USB device or be interfere by the radio signals from the computer or any other device.


This benefit is why you'll now find IR/RF remotes for computer USB components. These remotes use RF-to-IR converters to extend the range of an infrared remote


Optional Extra Functions of Remote Control Laser Pointer

Almost all the RC laser pointers cnould be added a U flash memory disk (U stick) function in to the receiver, this function is optional, people can choose this function or not. A rc laser pointer with U flash disk function makes more convenient in presentation.


How to use RC Laser Pointer

If you use any computer for multimedia presentations and the computer has a USB port, the RC Laser Pointer will allow you to maximise your impact by freeing you from the keyboard forever. Just walk into your teaching space with a RC Laser Pointer in your pocket, simply plug in the USB dongle (receiver) and open you presentation file, now  you are in action with full remote control within the palm of one hand. You can add impact to your presentations by using the built in laser pointer to indicate and emphasise items on the screen.


 Introduction technical topics about  USB  products:


        USB RC Laser Pointer     USB Phone/ Earphone / HEADSET / Audio
        USB SIM Card Reader/ Backup     USB Adaptor& Cable
        USB Mouse Pad     USB Stick / USB Flash Disk
        USB HUB     USB HDD / HDD Enclosure
        USB Card Reader     USB PEN
        USB Bluetooth / Dongle     USB Mouse & Keyboard
        USB Fan/ Light/ Carftwork     PC Camera
        Wireless Mouse & Keyboard     Other USB Promotion / gift








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