http://www.3dphotopro.com/lenticular_tool_kit.html#LTKS
http://www.microlens.com/pages/choosing_right_lens.htm
http://www.lpc-world.com/index.html
Lenticular lens sheets are designed to enhance certain image characteristics. In fact, standard lenticular lens sheet designs are broken down into two primary categories, Flip and 3D. The difference between the two designs is the viewing angle. A lenticular lens sheet designed for 3D images will have a narrow viewing angle (typically less than 30°). Conversely, a lenticular lens sheet designed for flip images will have a wider viewing angle (typically higher than 40°).
Micro Lens Technology standard lenticular lens sheets are usually made of Acrylic or PETG. Lenticular lens sheets made of PETG are not recommended for outdoor use because they will yellow over time and may warp at moderately high temperatures (100° F). However, they are preferred for interior use because they are easier to cut and will not shatter as easily as acrylic sheets.
The size (width by height) of the final image will help to determine the LPI of the lenticular lens sheet for your application. Typically, as the size of the image increases, the LPI of the lenticular lens sheet will decrease. The larger the image size, the more difficult it becomes to properly align the lens with the image or printer. A lower LPI sheet is easier to align than a higher LPI sheet due to its larger lenticule widths.
The viewing distance is also inversely proportional to the LPI of the lenticular lens sheet. A shorter viewing distance will typically require a lenticular lens sheet with a higher LPI than a longer viewing distance. As the viewing distance decreases, the individual lenticules become easier to see and can become distracting to the eye.
The quantity of images required may also determine the print method, which in turn will determine your lenticular lens sheet choice. Very high volumes of images will most likely be produced with printing presses. This means small format lenticular lens sheets (60 LPI and greater) will be used. Again their limitation is usually the size of the final image. If the lenticular image is greater than 5-10 square ft., then printing presses may not be an option.
