How to Choose Green Laser Pointers
Years back, lasers were a rare and expensive commodity that only a select few possessed. However, after the first invention of laser pointers, these futuristic devices became popular and they are now readily available.
Buying a laser now requires a bit more research as there are a variety of models on the current market. Here is a guide to help you select a green pointer to suit your specific needs.
Are there different laser spectrums?
A laser is a device that emits light through optical amplification based on the emission of electromagnetic radiation. Lasers come in all sorts of colors, each with its unique differences.
- Green - Green lasers are the most used because they are more receptible to the human eye. They are brighter than red and blue light and typically operate at 532 nm, making them suitable as small, powerful, handheld pointing devices. Green laser light is visible for thousands of feet in optimal conditions. Green laser pointers are great for shining into the sky as well as handling classroom and meetings pointing duties.
- Red - Red laser light started the whole pointer phenomenon. However, the light beam lacks the power and distance offered by newer models. Most of the modern models make use of the laser diode design that helps increase the power output for better visibility.
- Blue - Thanks to Blu-ray HD video technology, blue hand-held lasers are becoming increasingly popular. They operate using a violet laser that is close to 405 nm. If you're looking for a fun and exotic pointer, then blue or violet is what you should consider purchasing.
- Yellow - A yellow pointer is not as common due to the complexity of converting the beam into visible light. Most of these models do not emit a constant, steady beam for long periods of time.
What features should I look for when purchasing a green pointer?
There are many kinds of green pointers at the market. A few things to pay close attention to include:
- Wavelength - Green laser beam wavelength is typically between 500 nm - 550 nm. Laser pointers with an output lower than 5 mW are used for presentation while higher outputs are used for burning.
- Power - The brightness of the beam is determined by its power supply, such as a battery.
What do I need to know before handling a laser pointer?
- Never view a laser pointer using optical instruments such as a microscope or a binocular
- Avoid direct contact with eyes or skin.
- Do not point a laser at reflective surfaces such as windows or mirrors.
- Remove the batteries when you are no longer working with the laser to prevent it from being accidentally activated.
- Do not look at diffused reflections without proper laser safety glasses especially against white backgrounds.