IR X-Ray Vision Applications
IR X-Ray Vision can be used for improving visibility through certain kinds of
fog or haze. This property is particularly important for long-distance photography on the
ground where the detail of distant objects is often obscured by fog, mist, haze,
rain, snow, smog, dust or sand. It
is also useful for high altitude, and especially oblique photography from the air like when landing an airplane in a foggy airport. Actually,
IR X-Ray Vision does not always result in a very
striking increase in the range of vision, but it generally increases the contrast of the distant objects
and thus the amount of detail that can be seen.
IR X-Ray Vision can help you to see perfectly through sunglasses and dark,
tinted car windows. Let's imagine there's a man walking the street. He fits the
description of a known murder suspect, but he is wearing a pair of dark
sunglasses, so no-one can see his eyes. Yet there is a way to check his identity
without even having to approach the man - a camera equipped with a KAYA PF
would see straight through the dark sunglasses. To the viewer, they
now appear totally transparent, like standard glasses. The man's face
would be identifiable even if he was in a car with tinted windows!
Voyeurism (not encouraged!)
IR X-Ray Vision is able to see through some types of clothes, for
example, thin clothes, tight clothes,
sundresses, swimsuits and so forth. Be aware that this means that you can see a person's body
or underwear through the external garment. In other words, a camera equipped with the PF filter allows you to "see through" someone's clothes. It is also possible to see through a woman's made-up face as if no
lipstick and foundation had been applied.
IR X-Ray Vision can be used in pollution monitoring applications. Since
both water and air when
pure have very low NIR (Near Infrared Rays) reflectance those appear very dark when viewed through
a camera equipped with the PF filter. But their reflectance may be greatly
increased by the presence of minute quantities of dissolved or suspended
materials and this makes them appear less dark under the same conditions.
Though IR X-Ray Vision will not detect thermal pollution such as warm water entering a
river from a generating station or hot gases above a smokestack, it may detect
chemicals, certain dusts, pollens, aerosols and gases dissolved in gaseous or
aqueous effluents owing to pure water and air's low NIR reflectance.
IR X-Ray Vision can be used to obtain data on sea-ice distribution and
movement. Because of its low reflectance to infrared radiation, water appears
very dark and the ice appears light in an image. Therefore, the interface
between water and ice and land becomes highly discernible.
Agriculture, Plant Pathology and Forest Survey
IR X-Ray Vision can be used in agriculture, plant pathology and forest
surveys for the detection of crop yields, crop and tree diseases, insect
infestations in forests and orchards, and identification of tree species. NIR
images of foliage
made with a camera equipped with the PF filter often show great variations in NIR reflectance even when leaves visually show just small variations in shades of green.
When viewed through a camera equipped with the PF filter, healthy
grasses and the foliage of healthy deciduous trees appear white because of the
high NIR transmission characteristic of green chlorophyll and the high NIR
reflectance of the underlying cellular structure of these subjects. On the contrary,
diseased and dead trees and burned grass tend to appear dark in an NIR images. Also
in any given vegetation, the season, the water and mineral
content of the soil, and the age and health of the vegetation may cause its NIR reflectance to vary. In fact, the first sign of a distressed tree (or
plant) is often a decrease in NIR reflectance, which frequently first
becomes apparent in NIR images. This means that the first sign can be detected
by using IR X-Ray Vision before trouble becomes
Documents and Paintings Inspection
Inks, dyes, pigments, and other materials which may appear indistinguishable to the eye
differently in NIR images. Printed matter, engravings and photographs that have become
undecipherable through dirt or age or other damage can frequently be revealed
when viewed through a camera equipped with the PF filter. Mechanical or
chemical erasure can often be determined, even if overwritten, provided the overwriting is in an ink transparent to
NIR. Even writing
on documents charred in fires can also be readable provided the charring has
not gone too far. Differences in inks and dyes used in forged documents,
certificates or identification can also be distinguished when viewed through
a camera equipped with the PF filter.
IR X-Ray Vision often penetrates the surface of ancient inks and
dyes of paintings, art or artifacts and reveal what lies beneath.
Thus, paintings or other similar works of art can be examined to
determine the authenticity
of those or to see if there has been over-painting or
fluoresced see-through techniques often
show off its surprising ability to make
visible a subject that gives our eyes very little or no clue as to its existence.
Here is one example: The subject was a letter that had been placed in a home-made time capsule and
buried near the cornerstone of a private home. 20 years later it was unearthed
and, to the dismay of the family, all the words written by the mother of the
family with pen and ink were washed away by water that had seeped into the box. The residual ink remaining in the paper was quite invisible to the naked eye
but our fluoresced see-through technique reveals the messages dramatically.
Thus, IR X-Ray Vision can be a simple yet powerful
for the study of faded, burned, worn, dirty or altered documents or paintings,
secret writing and so forth.
IR X-Ray Vision can be effective for detecting camouflage when
photographing objects painted to simulate foliage. Camouflage detection may be
possible by directly comparing a normal picture with a NIR picture of the same objects.
For example, most normal green paints, which match green foliage visually, are
strong absorbers of NIR and appear dark in a NIR picture, while natural
healthy green foliage appears white. So camouflaged areas are most easily detected
through a PF-equipped camera's viewfinder or LCD screen.
IR X-Ray Vision can be used in the textile field for detection of irregularities to the
fibers, particularly where the material is dyed a dark tone and visual
examination is difficult.
Some other applications where IR X-Ray Vision can be used include: environmental studies, natural resource studies,
monitoring geographical and geological changes,
investigating coastal erosion and identifying marsh land vegetation, archaeological exploration, surface mining and mined land
disturbances, hydrological studies and channel mapping, monitoring oil spills, irrigation
studies, medicine, mineralogy, philately, art history,
Thus, the imaginative user should have little difficulty in recognizing the potential
of IR X-Ray Vision and expanding its use.