Some cell phone cameras are more sensitive to infrared light than others. In most
cases camera that work well in low lighting tend to be more sensitive to infrared light.
Ideal Creations offers two different filters. The 800nm filter pushes your cell phone camera
into a deeper infrared spectrum which provides even better penetration. However, cell
phones that are not sensitive to infrared light will have the problem of the images being
too dark. For these cameras the 750nm infrared filter is recommended because the images will
appear brigher and clearer.
Best Condition for Penetrating Clothes
1) Fabrics that have no cotton. Material like polyester, nylon, rayon,
and silk work well.
2) Colored fabrics works well. Fabrics that have colorful patterns
or are red, blue, green or black are great. However, white or
light yellow doesn't work because they tend to reflect the IR Light.
3) Large amount of infrared light is required. Sun light contains
an incredible amounts of infrared light. A bright incandescent
bulbs (standard light bulb) with a reflector works well. However,
fluorescent bulbs do not work at all.
4) A single thin layer of fabric.
5) It Works extreemly well if the fabric is wet and synthtic.
An example would be a tan through swimsuit.
See how water helps make even thick fabrics transparent.
Left is a thick nylon swimsuit, right shows it using the
infrared camera and below is it wet with the infrared camera
Camera with IR Filter
and Thin Wet Fabric
Below is an example of how infrared light is able to go through a dark
Fabric Without Filter
Fabric With Filter
Below is an example of how IR light can penetrate
the top layer of skin. When the light is angled correctly
the veins under the skin can be seen clearly with the 800nm IR Filter.