Eye Anatomy
the clear front surface of the eye, which acts like a camera lens.
What is a Cornea?
The measurement system/chart used to evaluate and categorize the full range of light and energy wavelengths:
What is the Electromagnetic Spectrum?
Typically the first Inspection process in an NDT part evaluation:
What is Visual Testing?
Every inspector is affected differently by perception, fatigue, and attitude. In visual inspection, these factors are classified as
What is Physiological Factors?
Unit of measure for illuminance in the SI system. Equivalent to lm/m2.
What is Lux (lx)?
functions like the diaphragm of a camera, controlling the amount of light reaching the back of the eye by automatically adjusting the size of the pupil (aperture).
What is an Iris?
one of the main properties (called color appearance parameters) of a color, defined technically (in the CIECAM02 model), as "the degree to which a stimulus can be described as similar to or different from stimuli that are described as red, green, blue, and yellow
What is Hue?
Magnetic particle Testing and liquid penetrant Testing are two methods of enhancing what type of inspection?
What is Visual Testing or Inspection
Photometers used to measure the reflectance of materials or surfaces in specialized ways:
What are Reflectometers?
These two NDT faculty are HARD CORE BIKERS!
Who is Zak Milligan (mountain bikes) and Emily O'Daniell (Harley!!!)?
located directly behind the pupil and further focuses light. Through a process called accommodation, this lens helps the eye automatically focus on near and approaching objects, like an autofocus camera lens.
What is a Lens?
380-770 nm on the electromagnetic spectrum:
What is the Visible Light Section?
We use this VT inspection tool to create shadows on the surface of a part, assisting in the interrogation of the part in search of surface irregularities and/or defects.
what is light?
The use of chemical solutions to attack material surfaces in order to improve the visibility of discontinuities for visual inspection at normal and low power magnification:
What is Macroetching?
Former unit of measure for illumination, equivalent to I lumen/ft2 or I candle of luminance measured at 1ft.
What is a Foot-Candle?
the light-sensitive inner lining of the back of the eye. The retina acts like an electronic image sensor of a digital camera, converting optical images into electronic signals. The optic nerve then transmits these signals to the visual cortex — the part of the brain that controls our sense of sight.
What is a Retina?
Excessive brightness (or brightness varying by more than 10:1 within the field of view) that interferes with clear vision, critical observation, and judgment.
What is Glare?
Volumetric Examination
What is inspecting the internal area of an object that cannot be seen at the surface with the naked eye?
Examples include UT, RT, and CT
A method used for copying the topography of a surface that cannot be moved or one that would be damaged in transferal:
What is Replication?
Often mistaken for Sasquatch and has an uncanny resemblance to Gilligan?
Who is Zak Milligan?
The very center and dark part of the eye.
(hint) Also a student......
What is a pupil?
Color composed of a single hue, having a very narrow band of wavelength.
What is Monochromatic?
Considered by ASNT, NAS-410, NASA, President Biden and Professor Ballard to be the most boring lectures in all of NDT:
What is a Zak Milligan UT lecture?
Glare can be reduced on an inspection surface making it easier or more accurate to inspect:
What is polarized Light?
Electromagnetic radiation with wavelengths from 4-400 nm, between visible light and X-rays.
What is Ultraviolet Light (UV)?