<P> In its pure form , holography requires the use of laser light for illuminating the subject and for viewing the finished hologram . In a side - by - side comparison under optimal conditions , a holographic image is visually indistinguishable from the actual subject . A microscopic level of detail throughout the recorded volume of space can be reproduced . In common practice , however , major image quality compromises are made to eliminate the need for laser illumination when viewing the hologram , and sometimes , to the extent possible , also when making it . Holographic portraiture often resorts to a non-holographic intermediate imaging procedure , to avoid the hazardous high - powered pulsed lasers otherwise needed to optically `` freeze '' living subjects as perfectly as the extremely motion - intolerant holographic recording process requires . Holograms can now also be entirely computer - generated to show objects or scenes that never existed . </P>
<P> In its pure form , holography requires the use of laser light for illuminating the subject and for viewing the finished hologram . In a side - by - side comparison under optimal conditions , a holographic image is visually indistinguishable from the actual subject . A microscopic level of detail throughout the recorded volume of space can be reproduced . In common practice , however , major image quality compromises are made to eliminate the need for laser illumination when viewing the hologram , and sometimes , to the extent possible , also when making it . Holographic portraiture often resorts to a non-holographic intermediate imaging procedure , to avoid the hazardous high - powered pulsed lasers otherwise needed to optically `` freeze '' living subjects as perfectly as the extremely motion - intolerant holographic recording process requires . Holograms can now also be entirely computer - generated to show objects or scenes that never existed . </P>
what is a three dimensional image produced by laser light
what is a three dimensional image produced by laser light
hologram
hologram