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Range-finding device and imaging apparatus

A distance measuring device, non-imaging technology, applied in the direction of measuring device, focusing device, measuring distance, etc., can solve problems such as poor work efficiency

Inactive Publication Date: 2011-12-28
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, conventionally, when arranging separately formed image pickup units on a substrate during assembling a distance measuring device, it is necessary to correct positional deviation and angular deviation of the distance measuring image pickup unit, which causes poor work efficiency

Method used

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  • Range-finding device and imaging apparatus

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0044] figure 1 is a front view showing a digital camera as an example of an imaging apparatus including a distance measuring device according to Example 1 of the present invention, figure 2 is schematically shown figure 1 The block diagram of the system configuration of the digital camera shown in, Figure 3A is a schematic longitudinal sectional view showing the distance measuring device, and Figure 3B is a plan view showing an image pickup unit for distance measurement.

[0045] (external configuration of digital camera)

[0046] Such as figure 1 As shown in , on the front side of a digital camera 1 according to an example of the present invention, a photographing lens 2 having a high optical magnification zoom function, a front side lens array 4 of a distance measuring device 3 and the like are arranged. On the surface of the lens array 4 , a pair of distance-measuring lenses 5 a , 5 b provided at an interval in the left-right direction from each other are integrall...

example 2

[0081] Figure 6A is a schematic longitudinal sectional view showing a distance measuring device according to Example 2, and Figure 6B is a plan view showing an image pickup unit for distance measurement. The same reference numerals are used for the same configuration as that of Example 1. The configuration of a digital camera using a distance measuring device and figure 1 with figure 2 The configuration of the digital camera of Example 1 shown is the same or similar, and therefore explanations thereof will be omitted.

[0082] The lens unit L may have a lens array and a plurality of lenses including a first lens pair and a second lens pair disposed therebetween at a second distance greater than the first distance, through which the subject image is formed on the ranging image pickup unit, and the distance calculation unit based on the The distance to the subject is calculated by the signal output from the first lens pair to the range-finding image pickup unit on which ...

example 3

[0100] Figure 8A is a schematic longitudinal sectional view showing a distance measuring device according to Example 3, and Figure 8B is a plan view showing an image pickup unit for distance measurement. The same reference numerals are used for the same configurations as those of Examples 1 and 2. The configuration of a digital camera using a distance measuring device and figure 1 with figure 2 The configurations of the digital cameras of Example 1 shown are the same or similar, and thus explanations thereof will be omitted.

[0101] The plurality of lenses may be four lenses formed in rows on the lens array, and the first lens pair is two lenses among the four lenses, and the second lens pair is two-side lenses. The two inner lenses may be formed on the rear surface of the lens array, and the two side lenses may be formed on the front side of the lens array.

[0102] Although in Example 2, the distance measuring device includes three distance measuring lenses and thre...

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Abstract

A range-finding device includes a plurality of image pickup units disposed at a predetermined interval with each other, a lens unit to form subject images of a subject on the plurality of image pickup units, the image pickup units on which the subject image is formed outputting signals of the subject image, and a distance calculation unit to calculate a distance to the subject based on the signals output from the image pickup units. The plurality of image pickup units are formed on a single substrate. The subject image is formed through the lens unit on at least two image pickup units of the plurality of image pickup units. The distance calculation unit calculates a distance to the subject based on the signals output from the at least two image pickup units on each of which the subject image is formed.

Description

technical field [0001] The present invention relates to a distance measuring device configured to measure a distance from a subject to be photographed, and an imaging apparatus, such as a digital still camera, a digital video camera, etc., having the distance measuring device. Background technique [0002] As a digital still camera (hereinafter referred to as a digital camera) having an autofocus (AF) function, a distance measuring device in which an external measurement triangulation system is applied is conventionally known (see Japanese Patent Application Laid-Open No. 2002- 90616). [0003] A distance measuring device having a triangulation system includes a pair of distance measuring lenses arranged at a predetermined interval and a pair of planar distance measuring image pickup units on which subject images are respectively formed by the distance measuring lenses. The distance to a subject to be photographed can be obtained by respectively detecting parallax between s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/335H04N5/225G03B13/36G02B7/28G01C3/00H04N25/00
CPCG01C3/085G02B7/30
Inventor 大内田茂
Owner RICOH KK
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