### device | laser:

Diode laser
* Most diode lasers produce infrared light.
* emit beams.

Dye laser
* are particularly well suited for applications in which a precise color is required.
* employ an active material in a liquid suspension.
* use an organic dye as the gain medium
  - liquid organic dyes

Laser cutting
* Laser Cutting can produce parts with a level of accuracy impossible to obtain with hand made parts.
* enables the shape of the wood to be determined by computer programming.
* is very popular with film special effects companies and theme park design companies.
* requires protection from accidental eye contact with the beam or beam reflections.

Laser welding
* Most laser welding is done on thin materials.
* is considered cutting edge technology for platinum
  - fast, and produces results of consistently high quality
  - particularly useful in the welding of dissimilar metals
* versatile process for non-contact welding applications.

Photodisruptive laser
* use the light to cut or sculpt tissue.
* work more like a knife.

Semiconductor laser
* All semiconductor lasers become super efficient at low temperatures.
* are diodes which are electrically pumped
  - now the most widely used and versatile class of lasers
  - responsible for much of the explosion in telecommunications
  - the smallest and can now be made as small as a pin head
* offer several advantages over gas lasers.

Several laser
* emit invisible near infrared light.
* have clearance for hard tissue use on teeth.

Latch
* are catchs
  - fasteners
  - locks
  - low-level locks on shared internal structures
  - part of doors
* includes bases
  - keyholes
  - sections

### device:

Lens
* Most lenses are made of durable materials
  - glass
  - resistant materials
* Most lenses bend beams
  - light beams
  - change shapes
  - focus light
* Most lenses have corneas
  - thickness
* Some lenses are made of calcites
  - crystal
  - crystalline calcites
  - flexible plastic
* Some lenses are part of eyeglasseses
  - periscopes
  - submarines
* Some lenses become astronomical telescopes
  - create images
* Some lenses focus energy
  - heat energy
  - microwave radiation
* Some lenses have dark energy
  - receive light
* also play a big part in controlling light.
* alter the apparent size and distance of objects.
* are channels
  - clear indoors and darken outdoors for greater comfort in the sun
  - clear, rounded pieces of glass or plastic that bend light to form pictures
  - electronic equipment
* are in a variety of colors, too, including brown, grey and silver mirror
  - many cases the only way to study certain objects at high redshift
* are located in cameras
  - eyes
  - microscopes
  - optical devices
  - organs
* are part of cameras
  - optical instruments
  - plants
  - singulars
  - use to light and make objects appear larger than they really are
* are used for cameras
  - magnification
  - in glasses and contacts to help correct vision
  - to focus light
* can also cause an allergic reaction
  - focus light and make images in a very similar way to mirrors
* cause parallel beams to converge or diverge.
* concentrates light on group of photoreceptors.
* create effects.
* differ from one another in terms of their shape and the materials from which they are made.
  - definable chromatic aberrations, and prisms have definable dispersion characteristics
  - three main shapes
* help users.
* include eyepieces
  - zoom eyepieces
* includes sections.
* is an optical device
* make effects.
* serve as prisms and bend light to a focal point
  - to refract light at each boundary
* suffer from aberrations that distort images.
* transmits light to receptors in the eye.

### device | lens:

Aspheric lens
* assure edge to edge clarity.
* provide correction for small distortions in vision.
* use flatter base curves in their design.