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Measurement apparatus

A technology for measuring devices and detecting components, which is applied in measuring devices, color measuring devices, optical radiation measurements, etc., can solve problems such as inaccurate corrections, and achieve the effect of improving measurement accuracy

Inactive Publication Date: 2015-11-18
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, it is not possible to obtain only the wavelength detection error amount Δλ
Since the wavelength detection error amount Δλ cannot be accurately detected, it cannot be accurately corrected, resulting in a measurement error

Method used

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no. 1 example

[0028] A first embodiment according to the present invention will be described in detail with reference to the drawings.

[0029] (image forming device)

[0030] The first embodiment will be described using an electrophotographic laser beam printer. Although the following description is based on an electrophotographic method, the present invention is also applicable to an image forming apparatus that fixes an image by a thermal drying method, such as an inkjet printer or a thermal sublimation printer. The structure and operation of the image forming apparatus according to the present invention will be described.

[0031] figure 1 is a sectional view showing the structure of an image forming apparatus (hereinafter, will be referred to as a printer) 100 in the embodiment. The printer 100 includes a housing 101 . The casing 101 includes various mechanisms for constituting the engine unit and a control board storage unit (not shown), the control board storage unit stores the ...

no. 2 example

[0118] As another embodiment of the present invention, the second embodiment employs a method in which correction of the wavelength detection error is performed using a table of the wavelength detection error amount Δλ with respect to temperature change. Differences from the first embodiment will be described in detail.

[0119] Figure 9 A table showing the wavelength detection error amount Δλ with respect to temperature change is shown. As the value of each wavelength detection error amount Δλ in this table, it is assumed that a typical value previously obtained through experiments has been stored in the memory 205 . In the second embodiment, the temperature fluctuation amount ΔT' of the LED light source is detected by the same operation as that in the first embodiment. The wavelength detection error amount Δλ corresponding to the obtained LED temperature fluctuation amount ΔT′ is read out from the table, and a correction operation is performed.

[0120] [processing seque...

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Abstract

A measurement apparatus comprises: a light emitting means for emitting a light; a light receiving means for receiving a reflected light from a measurement target, the light receiving means comprises a plurality of light-receiving elements; a detection means for detecting a temperature of the light emitting means; a determination means for determining a correspondence between each light-receiving element of the light receiving means and a wavelength of the reflected light from the measurement target based on a result of receiving the reflected light from a reference element and the temperature of the light emitting means detected by the detection means; and an output means for outputting spectral reflectance information for the measurement target based on a result of receiving the reflected light from the measurement target and the correspondence determined by the determination means.

Description

technical field [0001] The invention relates to a measuring device with the function of measuring color. Background technique [0002] The image quality (hereinafter referred to as image quality) of image forming apparatuses (hereinafter referred to as printers) which have become popular recently is determined by various factors such as grain size, in-plane uniformity, character quality, and color reproducibility (including color stability). factors are determined. One of the most important factors is color reproducibility. [0003] With regard to color reproducibility, color difference affects not only between devices of the same model but also between devices of different models, between image forming apparatuses of different methods, and between image forming apparatuses and image display apparatuses. In order to perform color matching between such devices, software and measurement devices for generating a multidimensional LUT (Look Up Table) called an ICC (Internationa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/50G01J3/02G03G15/01
CPCG03G15/043G01J3/0286G01J3/502
Inventor 古田泰友
Owner CANON KK
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