摘要:
In a rangefinder, if sensor data initially received by a sensor data storage part from an A/D converter includes data with low contrast, the sensor data storage part receives the sensor data at least one additional time, adds additionally received sensor data to the initially received sensor data, and stores their sum. In accordance with the sum of sensor data stored in the sensor data storage part, a correlation calculation and a rangefinding calculation are carried out, which enables rangefinding with respect to an object having low contrast. Also, the time required for A/D-converting the sensor data again and adding the resulting data to those initially obtained is much shorter than the integration time required for integrating output signals of a pair of line sensors a second time for a region with low luminance and low contrast.
摘要:
A novel method of electrochemical treatment such as electroplating, etc. and an electrochemical reaction apparatus thereof which is high in reactability and able to be electrochemically reacted efficiently, which is small or zero in amount of generation of liquid waste such as electrolytic solution and cleaning liquid and therefore, amicable to the environment, and in which it is no more required to clean the electrode, etc. with cleaning liquid after reaction. Electrochemical reaction is executed in a reaction vessel (6) containing matter (5) which is in a supercritical or subcritical state and an electrolytic solution (1), and after reaction, the supercritical or subcritical matter (5) is shifted into a state of the matter (5) before being shifted into a critical state.
摘要:
A distance measuring apparatus detects the shortest distance measurement value corresponding to the shortest distance among multiple distance measurements, and selects distance measurement values which differ from the shortest distance measurement value by a value less than a threshold value; calculates a first correction value as a mean of differences between the shortest distance measurement value and the distance measurement values selected; detecting the longest distance measurement value corresponding to the longest distance among the distance measurement values selected, and calculates a second correction value as ½ of the difference between the shortest distance measurement value and the longest distance measurement value; and calculates autofocus data by correcting the shortest distance measurement value, adopting a correction value that is the lesser of the first correction value and the second correction value.
摘要:
The sensor sensitivity and the method of setting the peak selected area of the AF sensor are changed according to the luminance level of the distance measurement object. The distance measuring apparatus uses a passive AF sensor to determine the distance of a distance measuring object by sensor data obtained from the AF sensor, wherein: if the distance measurement object has high luminance, the sensor sensitivity is set at low sensitivity, the distance measurement area is divided into three areas, and sensor data is acquired for each area as a peak selected area of the AF sensor; if the distance measurement object has moderate luminance, the sensor sensitivity is set at low sensitivity, and sensor data is acquired with the entire area of the distance measurement area being the peak selected area of the AF sensor; and if the distance measurement object has low luminance, the sensor sensitivity is set at high sensitivity, and sensor data is acquired with the entire area of the distance measurement area being the peak selected area, whereby proper sensor data is acquired to carry out distance measurement suitably and reliably.
摘要:
A correlation value calculation is performed by using AF data arranged at predetermined intervals in the AF data in a pair of window ranges, so that a frequency of calculation can be reduced. On the other hand, a correlation value calculation is performed by using all the AF data in the pair of window ranges only in predetermined ranges before and after the shift amount of the pair of window ranges when the highest correlation value in the correlation values is obtained, thereby suppressing a reduction in measurement precision. For example, in a pair of the AF data obtained from a pair of window ranges, the correlation value calculation is performed by using every third piece of the AF data. Then, the correlation value calculation (normal calculation) is performed by using all the AF data in the pair of window ranges in predetermined ranges (range for re-performing the calculation) before and after the shift amount of the pair of window ranges when the highest correlation value is obtained in the correlation values obtained by the former correlation value calculation.
摘要:
A multiple coding apparatus comprises a first encoder for encoding a plurality of input sequences in parallel so as to generate a plurality of output coded sequences in parallel while adding an error-correcting bit sequence to each of the plurality of input sequences. An interleaving circuit interleaves the plurality of output coded sequences applied thereto in parallel from the first encoder without having to use any memory. The interleaving circuit permutes the plurality of input sequences on a bit-by-bit or symbol-by-symbol basis so as to generate a plurality of interleaved coded sequences in parallel. A second encoder then encodes the plurality of interleaved coded sequences applied thereto in parallel from the interleaving circuit so as to generate a plurality of output coded sequences in parallel while adding an error-correcting bit sequence to each of the plurality of interleaved coded sequences.
摘要:
A rangefinder apparatus includes infrared light emitting diodes (IREDS) for projecting respective light beams toward a target object; and a position sensitive detector (PSD), disposed at a distance from the IREDS, having a light-detecting region for detecting respective reflected light beams of the light beams projected to the target object, the light-detecting region of the PSD being shaped substantially as a parallelogram with no rectangular corners. Since the light-detecting region of light-detecting means is shaped substantially as a parallelogram with no rectangular corners, the rangefinding accuracy can be improved while the manufacturing cost is restrained from increasing.
摘要:
A distance measurement system for measuring a distance with a little time difference while maintaining high accuracy. An infrared emitting diode (IRED) emits a beam of light toward an object at a distance to be measured and a position sensitive detector (PSD) receives reflected light. Outputs from the PSD are processed by signal processing circuits, and an arithmetic circuit, which issues an output as distance information. An integrating circuit integrates the signal outputted by the arithmetic circuit and outputs a signal corresponding to the results of the integration. A CPU determines the distance to the object based on the signal outputted from the integrating circuit. In this distance measurement system, the integrating circuit starts integrating the signal outputted from the arithmetic circuit, immediately after the output, i.e., distance signal, from the arithmetic circuit is stabilized.
摘要:
In a rangefinder apparatus, a clamping circuit receives a far-side signal I2 output from a first signal processing circuit and outputs a signal I2c having a greater value than a clamp signal Ic and the far-side signal I2. An arithmetic circuit receives a near-side signal I1 output from a second signal processing circuit and the signal I2c output from the clamping circuit, calculates an output ratio (I1/(I1+I2c)), and outputs an output ratio signal. An integrating circuit receives the output ratio signal and, together with an integrating capacitor, integrates the output ratio signal several times. When switching the level of the clamp signal Ic before subsequent distance measuring operations in a continuous distance measurement, a clamp level switching circuit adds a value to the clamp signal, setting a new level.
摘要:
In the coding and decoding of Reed-Solomon codes formed of symbols larger than information symbols, redundant circuitry is eliminated, error detection and correction are preformed using a simple construction, and the reliability of error detection and correction is improved by processing only data of the same size as the information symbols. Two bits of dummy data which are surplus bits in 10 bits of one symbol of information are supplied from a dummy data input circuit to 8 bit input data. At the same time, syndrome data is generated form the surplus parts of check symbols by a syndrome data correction circuit. A part of the 10 bit data is selected by a selector, and supplied to a Galois field summation circuit. The output of the Galois field summation circuit is output to a register, and the output of this register is either selected without modification or via a Galois field coefficient multiplying circuit by a selector, and supplied to the Galois field summation circuit. The output of the register is output as syndrome data by a syndrome output terminal.