tojbogh pa' tuHmey
Holodeck Adventures (STC 104)

AFAIK we don't have a word for hologram, but *HaStaHey has been used occasionally on the List.  Since 2008 we've had nIyma' "phantom, apparition" which I rather like:

(MO to Lieven, 11/23?/2008):  nIyma' is the Klingon word for phantom or apparition--something that seems to appear, but isn't really there. It's not the same as ghost, which is the spirit of a dead person (and may or may not look like that person, or may not be visible at all), and it's not the same as spirit (or qa'), which is sort of a life force within a person (that escapes when a person dies and may exist somewhere somehow).

SEE ALSO:

mIllogh                 picture, image, drawing, etc. (n)

HaSta           visual display (on monitor) (n)

QIb                     shadow (n)

cha'                    show, display (picture) (v)

Hotlh           project, put on (screen) (v)