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BEO160829 > BEO 160829 LSO > Flashcards

BEO 160829 LSO Flashcards

1
Q

_____ _____ is ENERGY that is emitted, transferred, or received in the form of radiation; measured in JOULES (J)

A

Radiant Energy

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2
Q

_____ _____ is POWER that is emitted, transferred, or received in the form of radiation; measured in WATTS (W).

A

Radiant Power

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3
Q

The term LASER is an acronym standing for _____ _____ _____ _____ _____.

A

LIGHT AMPLIFICATION by STIMULATED EMISSION of RADIATION

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4
Q

What are the primary components of a laser?

A
  1. Lasing Medium
  2. Pumping System
  3. Optical Cavity
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5
Q

The laser material must have a _____ _____ in which the atoms or molecules can be trapped after receiving energy from the pumping system.

A

Metastable Stable

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6
Q

What are the FOUR modes of operation of a laser?

A
  1. Continuous wave
  2. Single pulsed
  3. Q-Switched
  4. Mode Lock
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7
Q

What are the THREE laser beam characteristics?

A
  1. Monochromatic
  2. Coherent
  3. Collimated
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8
Q

What are the two key US Government agencies involved in the regulation of lasers?

A

FDA

OSHA

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9
Q

What is the industry standard document regarding lasers?

A

ANSI Z136.1

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10
Q

What is the most common solid state laser?

A

Nd:YAG

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11
Q

The most common beam hazards are _____ in nature and can result in damage to the eyes and skin.

A

Biological

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12
Q

The most common cause of laser induced TISSUE damage are _____.

A

Thermal

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13
Q

_____ _____ are potential hazards associated with compressed gases, cryogenic materials, toxic, and carcinogenic materials and noise should be considered.

A

Industrial Hygiene

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14
Q

_____ _____ with a wavelength of <300 nm, cause damage to the cornea by the same photochemical mechanism as bright sunlight.

A

Far UV

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15
Q

_____ _____ with a wavelength of >1400 nm, damage the cornea through thermal damage throughout all layers of the cornea.

A

Far IR

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16
Q

_____ _____ with wavelengths between 300 and 400 nm, are primarily absorbed in the lens, but also deposit energy.

A

Near UV

17
Q

The ______ _____ _____ is the level of laser radiation to which a person may be exposed without hazardous effects or adverse biological changes in the eye or skin.

A

Maximum Permissible Exposure (MPE)

18
Q

When entering data into LHAZ, for the pulse mode, which 3 sections must be filled out?

A
  1. Energy per pulse
  2. Pulse Width
  3. Pulse Repetition Frequency
19
Q

Watts

A

Continuous

20
Q

Joules

A

Pulse / Energy

21
Q

What are two types of protection from lasers are used for the skin?

A
  1. “sun screen”
  2. Tightly woven fabrics
  3. Opaque gloves
22
Q

The _____ _____ _____ involves the evaluation of laser hazards to determine the type and degree of risk associated with the identified threats at each work place.

A

Conceptual Site Model

23
Q

_____ is the radiant power striking a surface.

A

Irradiance

24
Q

_____ _____ is the measure of exposure over a specific area.

A

Radiant Exposure

25
Q

_____ _____ is a type of ELECTROMAGNETIC RADIATION that exists in the infrared, visible, and UV portions of the electromagnetic spectrum.

A

Laser Radiation

26
Q

A single pulse laser must be less than _____ seconds.

A

0.25

27
Q

AFI ___ - ____ is the Laser Radiation Protection Program

A

48-139

28
Q

What two laser classes require medical exams to establish baseline and monitoring?

A

3B and 4

29
Q

The pulse laser is capable of creating acoustic shock waves through the skin causing rips/tears in the skin. This is known as _____ _____.

A

Photochemical Affect

30
Q

The _____ determines the depth of penetration.

A

Wavelength

31
Q

The _____ ______ ______ _____ is the distance from the laser where the energy of the laser beam falls to levels below the ocular MPE.
* It is a straight line measure

A

Nominal Ocular Hazard Distance

32
Q

The _____ _____ _____ is the space within which the level of direct, reflected, or scattered radiation exceeds the applicable MPE during normal operation.

A

Nominal Hazard Zone

33
Q

Specular

A

object reflects laser beam

34
Q

Diffuse Reflection

A

energy hits “rough” material that spreads (diffuses) energy.

35
Q

Laser Eye Protection should be _____ to prevent hazardous reflections and have side shields.

A

Curved

36
Q

The _____ _____ determines how much laser passes through.

A

Optical Density

BEO160829 (11 decks)

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