Rechargeable laser pointer for cat

The researchers determined the magnitude of this capability by building a Raman spectrometer using low-power and low-cost commercial green laser pointer. The relatively short wavelength of the powerful 2000mw blue laser helps to improve the detection of inherently weak Raman signals. The spectrometer is also able to first optically scan the entire sample, scanning from left to right, to locate individual particles of interest-a task usually performed by a large heavy Raman microscope. The laser emits measurement light at a frequency based on the wavelength of light called nanometers (nm). In the visible spectrum, 532nm green is the brightest laser color under the same output power. This means that 100mW from a green laser pointer will be 7-10 times brighter than a 100mW laser from another laser color (including red, blue, purple, and yellow). When green laser pointers were launched in the 1990s, their price was about US$400. Today, they are priced as low as $7.75 on Amazon. The pointer in the middle emits light beams in three stages, and each stage is the bright spot of laser development when the first appears. "This in itself is like a small class in quantum physics," Clark said.