Image scanning system

Claim 1

In a focusing system, a focus detecting device comprising: (A) signal integration type image scanning means for scanning a detection image of an object onto which the focusing system should be focused and for producing a scanned image signal representative of said detection image, said scanning means integrating each signal over a controlled signal integration time; (B) drive means for repetitively driving said image scanning means so that said scanning means repetitively scans said detection image and produces the scanned image signals repetitively; (C) integration control means for controlling, on the basis of each of the scanned image signals repetitively produced by said image scanning means, the signal integration time of said image scanning means in each of the repetitive drives of the scanning means by said drive means, said integration control means including data hold means for successively holding data indicative of the integration time of said scanning means in each of the repetitive drives by said drive means; (D) circuit means for receiving and processing the scanned image signal produced by said scanning means and for detecting the focusing condition of the focusing system onto the object; (E) light emitting display means coupled to said circuit means for displaying the focusing condition of the focusing system onto the object by emitting a light; and (F) display light control means coupled to said display means and said integration control means for controlling the intensity of the display light to be emitted from the display means on the basis of the signal integration time indication data held in said data hold means in said integration control means.

Claim 7

A device comprising: signal integration type radiation responsive means for receiving a radiation and for producing an electrical signal indicative of the intensity distribution of the received radiation, said radiation responsive means integrating a signal over a controlled signal integration time; integration control means for repetitively operating said radiation responsive means so that said responsive means produces the electrical signal repetitively; data hold means for successively holding data indicative of said integration time of said radiation responsive means in each of the repetitive operations of the responsive means by said integration control means; circuit means for receiving and processing the electrical signal produced by said radiation responsive means; light emitting display means coupled to said circuit means for displaying the process result of the circuit means by emitting a light; and display control means coupled to said display means and to said data hold means for controlling the display means on the basis of the integration time indication data held in said data hold means.

Claim 8

A device comprising: signal integration type radiation responsive means for receiving a radiation and for producing an electrical signal indicative of the intensity distribution of the received radiation, said radiation responsive means integrating a signal over a controlled signal integration time; integration control means for repetitively operating said radiation responsive means so that said responsive means produces the electrical signal repetitively; data hold means for successively holding data indicative of said integration time of said radiation responsive means in each of the repetitive operations of the responsive means by said integration control means; circuit means for receiving and processing the electrical signal produced by said radiation responsive means; light emitting display means coupled to said circuit means for displaying the process result of the circuit means by emitting a light; and display control means coupled to said display means and to said data hold means for controlling the display means on the basis of the integration time indication data held in said data hold means.

Claim 10

A system for producing quantized data on an image, comprising: (A) image scanning means for scanning the image and for producing a scanned image signal on the image; (B) detection means for detecting a specific level of the scanned image signal on the image; (C) quantization means for quantizing the scanned image signal produced by said image scanning means and for providing quantized data on the image, said quantization means providing first quantized data by quantizing the scanned signal with a first quantization standard determined on the basis of said specific level detected by said detection means and providing second quantized data by quantizing the scanned signal with a fixed second quantization standard; (D) discrimination means for discriminating whether or not the specific level detected by said detection means is within a predetermined range of levels, said discrimination means producing a first indication when the specific level is within said predetermined range and producing a second indication when the specific level deviates from said predetermined range; and (E) selection means responsive to said first and second indications produced by said discrimination means for selecting one of said first and second quantized data provided by said quantization means, said selection means selecting said first quantized data in response to said first indication and selecting said second quantized data in response to said second indication.

Claim 11

A system for producing quantized data on an image, comprising: (A) image scanning means for scanning the image and for producing a scanned image signal on the image; (B) detection means for detecting a specific level of the scanned image signal on the image; (C) quantization means for quantizing the scanned image signal produced by said image scanning means and for providing quantized data on the image, said quantization means providing first quantized data by quantizing the scanned signal with a first quantization standard determined on the basis of said specific level detected by said detection means and providing second quantized data by quantizing the scanned signal with a fixed second quantization standard; (D) discrimination means for discriminating whether or not the specific level detected by said detection means is within a predetermined range of levels, said discrimination means producing a first indication when the specific level is within said predetermined range and producing a second indication when the specific level deviates from said predetermined range; and (E) selection means responsive to said first and second indications produced by said discrimination means for selecting one of said first and second quantized data provided by said quantization means, said selection means selecting said first quantized data in response to said first indication and selecting said second quantized data in response to said second indication.

Claim 16

A system for producing quantized data on a received analog signal, comprising: (A) detection means for detecting a specific level of said analog signal; (B) quantization means for quantizing said analog signal and for providing quantized data on the signal, said quantization means providing first quantized data by quantizing the signal with a first quantization standard determined on the basis of said specific level detected by said detection means and providing second quantized data by quantizing the signals with a fixed second quantization standard; (C) discrimination means for discriminating whether or not the specific level detected by said detection means is within a predetermined range of levels, said discrimination means producing a first indication when the specific level is within said predetermined range and producing a second indication when the specific level deviates from said predetermined range; and (D) selection means responsive to said first and second indications produced by said discrimination means for selecting one of said first and second quantized data provided by said quantization means, said selection means selecting said first quantized data in response to said first indication and selecting said second quantized data in response to said second indication.

Claim 17

A system for producing quantized data on a received analog signal, comprising: (A) detection means for detecting a specific level of said analog signal; (B) quantization means for quantizing said analog signal and for providing quantized data on the signal, said quantization means providing first quantized data by quantizing the signal with a first quantization standard determined on the basis of said specific level detected by said detection means and providing second quantized data by quantizing the signals with a fixed second quantization standard; (C) discrimination means for discriminating whether or not the specific level detected by said detection means is within a predetermined range of levels, said discrimination means producing a first indication when the specific level is within said predetermined range and producing a second indication when the specific level deviates from said predetermined range; and (D) selection means responsive to said first and second indications produced by said discrimination means for selecting one of said first and second quantized data provided by said quantization means, said selection means selecting said first quantized data in response to said first indication and selecting said second quantized data in response to said second indication.