Laser scanners Laser scanners work the same way as pen type readers except that they use a laser beam as the light source and typically employ either a reciprocating mirror or a rotating prism to scan the laser beam back and forth across the bar code.

Female Voice Long range laser scanning by sending out a pulse that's a laser beam of light.

A laser differs from other sources of light in that it emits light coherently .

For the Macintosh, the files were provided as BinHexed StuffIt archives (.sit.hqx).

In a laser, what makes laser light so different from the light above my head here is that this light is incoherent many different colors and different frequencies, sort of like the way you clapped initially but if you were a laser, it would be rhythmic applause.

Of course even a laser whose output is normally continuous can be intentionally turned on and off at some rate in order to create pulses of light.

The system uses a green laser, with an output power of 1 watt which is high power for a consumer device laser.

The color temperature of a light source is the temperature of an ideal black body radiator that radiates light of comparable hue to that of the light source.

In Afshar's variant, light generated by a laser passes through two closely spaced circular pinholes (not slits).

Sunshine is the main source of vitamin D.

The minimum spot size on which a laser can be focused is limited by diffraction, and depends on the wavelength of the light and the numerical aperture of the lens used to focus it.

It measures the absorption of light in a sample The neat thing about this is, you have light source that flickers on and off at about 1,000 hertz, another light source that detects that light at 1,000 hertz, and so you can run this system in broad daylight.

The appearance of pigments is intimately connected to the color of the source light.

These stray rays of source light contribute to a slightly less saturated color.

Detectalia LASER

The important difference between a CCD reader and a pen or laser scanner is that the CCD reader is measuring emitted ambient light from the bar code whereas pen or laser scanners are measuring reflected light of a specific frequency originating from the scanner itself.

And what I'd like to tell you is we don't see shadow, and we don't see light too we see the source of the light.

The red dot is the laser light of the submarine Alvin to give us an idea about how far away we are from the vents.

Those described as having only light perception have no more sight than the ability to tell light from dark and the general direction of a light source.

Psylocke's telekinetic manifestations produce visible radiance in the physical world, and so she can use her psychic katana as a makeshift light source in areas of darkness.

So this robot is actually equipped with a camera and a laser rangefinder, laser scanner.

The Synchrotron Light Research Institute (SLRI) is a Thai synchrotron light source for physics, chemistry, material science, and life sciences.

And you enter that space, and you feel like, Wow! This is so impressive, just because of this focal point, this huge light source in the middle.

Countermatic Euro minus Laser

The photodiode measures the intensity of the light reflected back from the light source as the tip crosses each bar and space in the printed code.

We have lasers we can whiten it out.

Advanced guns with seeker lasers.

In simpler terms, there is a maximum angle from the fiber axis at which light may enter the fiber so that it will propagate, or travel, in the core of the fiber.

A candle is a solid block of wax with an embedded wick which is ignited to provide light and in some cases a fragrance.

And I was writing software to visualize laser scanners.

In the test, light from a point source is focused onto the center of curvature of the mirror and reflected back to a knife edge.

It is only possible to verify experimentally that the two way speed of light (for example, from a source to a mirror and back again) is frame independent, because it is impossible to measure the one way speed of light (for example, from a source to a distant detector) without some convention as to how clocks at the source and at the detector should be synchronized.

There is a phallus, clear acrylic phallus, with a camera and a light source, attached to a motor that is kind of going like this.

With no natural light source, Siva is one of these amazing places that when you look up you see a perfect tapestry.

More recently, at Einstein University, they just determined that fungi use radiation as a source of energy, much like plants use light.

And then the laser actually cuts.

In 1964, the Carbon dioxide laser was invented by Kumar Patel.

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.

I have solidified the beam of the laser pointer.

This is our femtosecond laser lab.

Next we can actually light them up with a laser.

And we also use three laser range finders.

Don't point the laser at my face!

As Jonathan Brown notes, each figure seems to carry its own light within or reflects the light that emanates from an unseen source .

The reduction in intensity of a light wave propagating through a medium by absorption of a part of its photons is often called attenuation.