Patent ID: 8638433

Claim:
A visual spectrophotometer for measuring molecular absorption spectra of a colored liquid comprising: an elongate light tube having a first end and a distal second end and a longitudinal axis; a spectrophotometer head mounted to the first end of the tube; the spectrophotometer head having a bore therethrough for receiving incoming light from a light source; the bore having a longitudinal axis coaxially aligned with the longitudinal axis of the light tube providing a light path through the spectrophotometer head and light tube; a slit assembly mounted in the spectrophotometer head providing a slit disposed in the light path; a stopped bore provided in a top wall of the spectrophotometer head extending downwardly orthogonal to the light path and stopped halfway through the light path; a transparent vial containing colored liquid disposed within the stopped bore; the stopped bore adapted to allow light in the light path to be transmitted through the colored liquid; a diffraction grating head mounted to the second end of the light tube; the diffraction grating head having a bore therethrough having a longitudinal axis coaxially aligned with the longitudinal axis of the light tube providing an extension of the light path through the diffraction grating head; a focusing lens disposed in the light path adjacent to the light tube; a diffraction grating disposed in the light path and spaced apart from the lens for displaying a spectrum of the light passing through the spectrophotometer head, the light tube and the diffraction grating head with an upper half displaying the spectrum of the light transmitted through the colored liquid and a lower half displaying the spectrum of the light source.