1. A temporal spectral photometer for use in obtaining spectral and temporal information simultaneously of an ultrafast pulse of light comprising: a. a housing having a pin hole type entrance slit for admitting at least a portion of said light, b. a streak camera tube disposed inside said housing, said streak camera tube having a photocathode on front thereof and a phosphor screen on the back thereof, c. electronic circuit means for driving said streak camera tube, d. optical means disposed inside said housing between said pin hole slit and said streak camera tube for forming an image of the pin hole slit onto the photocathode of the streak camera tube and at the same time dispersing the light admitted through said pin hole slit into its component wavelengths, and e. means for recording the resulting output image formed on the phosphor screen.