Patent ID: 6366315
Filing Date: 2002-04-02
Classification: H04N

Abstract:
A loss-free arrangement for lengthening scan lines and avoiding secondary optical and diffraction effects in a single optoelectronic camera with the aid of a special beam splitter and a number of linear CCD detector arrays, whereina single optics lens system (O) of the optoelectronic camera is followed by an optical beam splitter (ST), including alternatingly transparent segments (ST1, ST3, . . . ) with substantially complete transmission and reflective segments (ST2, ST4 , . . . ) with substantially complete reflection transparent segments and the reflective segments being interleaved via intermediate transition zones providing a gradual chance from full reflection to full transmission; from the number of linear CCD detector arrays (CCD1, CCD2, CCD3, CCD4, . . . ), two long line modules (M1, M2) are formed, so that in each long line module, free interstices (FR) between the linear CCD detector arrays are shorter than the length of a light-sensitive segment of one linear CCD detector array; two long line modules (M1, M2) each are disposed, one following the beam splitter (ST), below its transparent segments (ST1, ST3, . . . ), and the other one laterally of this beam splitter (ST) next to its reflective segments (ST2, ST4 , . . . ), such that the centers of the linear CCD detector arrays (CCD2, CCD4, . . . ) of the one long line module (M2) coincide with the centers of the free interstices (FR) of the other long line module (M1), and the lengths of the free interstices (FR) in each long line module (M1, M2) are selected to be so short that for the optoelectronic camera, a radiometrically largely loss-free signal is assured, on the one hand by means of substantially loss-free signals from the central segment of a linear CCD detector array behind the completely transparent, or respectively behind the completely reflective, segment of the beam splitter (ST), and on the other hand by means of electronic summation of signals from adjacent linear CCD detector arrays (CCD1, CCD2; CCD2, CCD3; CCD3, CCD4; . . . ) in coinciding segments, corresponding to the transition zones (ÃœB1, ÃœB2, ÃœB3, ÃœB4, . . . ), between the long line modules (M1, M2).