Spectrophotometer for use as a split beam and dual wavelength measurements

Claim 2

A spectrophotometer comprising a light source, optical means for directing the light beams from said light source along first and second paths, a pair of monochromators positioned along said first and second paths, respectively, for receiving the light beams from said optical means, a chopper for alternately interrupting the respective light beams in said first and second paths at the outputs of said monochromators, a first mirror block means separate from said chopper for receiving the interrupted light beams from said chopper and for directing a portion of the respective light beams in said first and second light paths into a common light path, a cuvette housing positioned at the output of said first mirror block means and through which said common light path extends, and detector means for receiving light from the output of said cuvette housing, said first mirror block means directing the remaining portion of respective light beams in said first and second light paths not directed into the common light path away from at least one of said cuvette housing and said detector means, whereby the presence of shielding means for interrupting the light beams is avoided and further including a second mirror block means interchangeable with said first mirror block means for separately deflecting and condensing the respective light beams in said first and second light paths from said chopper so as to direct the separate light beams onto said cuvette housing.

Claim 3

A spectrophotometer as defined in claim 1, further including first means for condensing and deflecting the respective light beams in said first and second light paths from said monochromators to said chopper and second means for condensing and deflecting the respective light beams in said first and second light paths from said chopper to said mirror block means.

Claim 4

A spectrophotometer as defined in claim 1, wherein said first mirror block means includes a plane mirror means receiving a light beam from one of said first and second paths, a grating means for receiving light beams from said plane mirror means and the other of said first and second paths, and a focusing means.

Claim 5

A spectrophotometer as defined in claim 1, wherein said second mirror block means comprises first and second plane mirror means and first and second focusing means, said first plane mirror means and said first focusing means deflecting and condensing the light beam in said first light path from said chopper and said second plane mirror means and said second focusing means deflecting and condensing the light beam in said second light path from said chopper.

Claim 6

A spectrophotometer comprising a light source, optical means for directing the light beams from said light source along first and second paths, a pair of monochromators positioned along said first and second paths, respectively, for receiving the light beams from said optical means, a chopper for alternately interrupting the respective light beams in said first and second paths at the outputs of said monochromators, one mirror block means separate from said chopper for receiving the interrupted light beams from said chopper for separately deflecting and condensing the respective light beams in said first and second light paths from said chopper, a cuvette housing positioned at the output of said one mirror block means and through which the respective light beams from said mirror block means passes, and detector means for receiving the respective light beams from the output of said cuvette housing, and further including another mirRor block means interchangeable with said one mirror block means for receiving the interrupted light beams from said chopper for directing the respective light beams in said first and second paths into a common light path onto said cuvette housing.

Claim 7

A spectrophotometer comprising a light source, optical means for directing the light beams from said light source along first and second paths, a pair of monochromators positioned along said first and second paths, respectively, for receiving the light beams from said optical means, a chopper for alternately interrupting the respective light beams in said first and second paths at the outputs of said monochromators, one mirror block means separate from said chopper for receiving the interrupted light beams from said chopper for separately deflecting and condensing the respective light beams in said first and second light paths from said chopper, a cuvette housing positioned at the output of said one mirror block means and through which the respective light beams from said mirror block means passes, and detector means for receiving the respective light beams from the output of said cuvette housing, and further including another mirRor block means interchangeable with said one mirror block means for receiving the interrupted light beams from said chopper for directing the respective light beams in said first and second paths into a common light path onto said cuvette housing.

Claim 8

A spectrophotometer as defined in claim 5, further including first means for condensing and deflecting the respective light beams in said first and second light paths from said monochromators to said chopper and second means for condensing and deflecting the respective light beams in said first and second light paths from said chopper to said mirror block means. cuvette

Claim 9

A spectrophotometer comprising a light source, optical means for directing the light beams from said light source along first and second paths, a pair of monochromators positioned along said first and second paths, respectively, for receiving the light beams from said optical means, first means for condensing and deflecting the respective light beams in the respective first and second light paths from said monochromators, a ccuvette housing through which the respective light beams from said first means pass, a chopper for alternately interrupting the respective light beams in said first and second paths from said cuvette housing, second means for condensing and deflecting the respective light beams in said first and second light paths from said chopper, a first mirror block means for receiving the respective light beams from said second means for directing a portion of the respective light beams in said first and second light paths into a common light path, and detector means for receiving the respective light beams from the output of said mirror block means, said mirror block means directing the remaining portion of respective light beams in said first and second light paths not directed into the common light path away from at least one of said cuvette housing and said detector means, whereby the presence of shielding means for interrupting the light beams is avoided, and further including a second mirror block means interchangeable with said first mirror block means for separately deflecting and condensing the respective light beams in said first and second light paths from said second means so as to direct the separate light beams onto said detector means.

Claim 10

A spectrophotometer comprising a light source, optical means for directing the light beams from said light source along first and second paths, a pair of monochromators positioned along said first and second paths, respectively, for receiving the light beams from said optical means, first means for condensing and deflecting the respective light beams in the respective first and second light paths from said monochromators, a ccuvette housing through which the respective light beams from said first means pass, a chopper for alternately interrupting the respective light beams in said first and second paths from said cuvette housing, second means for condensing and deflecting the respective light beams in said first and second light paths from said chopper, a first mirror block means for receiving the respective light beams from said second means for directing a portion of the respective light beams in said first and second light paths into a common light path, and detector means for receiving the respective light beams from the output of said mirror block means, said mirror block means directing the remaining portion of respective light beams in said first and second light paths not directed into the common light path away from at least one of said cuvette housing and said detector means, whereby the presence of shielding means for interrupting the light beams is avoided, and further including a second mirror block means interchangeable with said first mirror block means for separately deflecting and condensing the respective light beams in said first and second light paths from said second means so as to direct the separate light beams onto said detector means.