Speckleless illumination of objects by laser light results when the laser light is transmitted or is reflected by a moving diffuser
OwnerGeorge M. Sawyerinventor
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Abstract
When laser light is transmitted by or is reflected by a diffuser onto an object being illuminated, the object is not evenly illuminated, but is speckled with large speckles. The invention uses a moving diffuser which reduces the sizes of the speckles when the object is visually observed, and eliminates the speckles when a photographic film or plate is located at the object position and records the laser light.
Claims10
A process for making a photograph, where the subject is illuminated with laser light during exposure, is accomplished with a process comprising the following steps:
- Step 1 Light from a laser is obtained
- Step 2 Said light from the laser is directed to impinge upon a light-diffusing, moving-element;
- light reflected by said element is diffuse
- Step 3 The subject being photographed is positioned to be illuminated by diffuse light from said light-diffusing, moving-element
- Step 4 The subject reflects or transmits the diffuse light with which it is illuminated
- Step 5 Light from the subject falls on a layered photosensitive element which records the image of the subject or the presence of the subject;
- the photosensitive element is thus exposed
- Step 6 The exposed photosensitive element is processed, if necessary, and a photograph results.
A process for making a photograph, where the subject is illuminated with laser light during exposure, is accomplished with a process comprising the following steps:
- Step 1 Light from a laser is obtained
- Step 2 Said light from the laser is directed to impinge upon a light-diffusing, moving-element;
- light transmitted by said element is diffuse
- Step 3 The subject being photographed is positioned to be illuminated by diffuse light from said light-diffusing, moving-element
- Step 4 The subject reflects or transmits the diffuse light with which it is illuminated
- Step 5 Light from the subject falls on a layered photosensitive element which records the image of the subject or the presence of the subject;
- the photosensitive element is thus exposed
- Step 6 The exposed photosensitive element is processed, if necessary, and a photograph results.
Dependencies are inferred from the claim text.