The Latent Image Sensor
Used briefly in the second Ghostbusters movie
during the montage scenes and seen here in
Venkman's hand:  
Star Trek The Next Generation:
Though never given a name during the movie,
Keith Starska suggested that the name given have
the initials of L.I.S. in honor of Lost In Space. So the
name Latent Image Sensor was born. Since this is a
rental prop from a prop house in Los Angeles it's
been used in several movies and T.V. shows:

Big Bang Theory:
Page Two