JPH06292208A - Image pickup device for microscope - Google Patents

Abstract

PURPOSE:To adjust white balance automatically by correcting the white balance according to a detected color balance so as to allow the inside of the microscope to generate a cross reference table between a luminous quantity and a color temperature characteristic without relying on an external device. CONSTITUTION:An output of a luminous quantity detector 5 detecting a luminous quantity of a light source 3 is stored in a predetermined address of a memory 6. An arithmetic unit 7 reads the predetermined address of the memory 6 to operate a relative gain. For example, a luminous quantity level of the light source 3 is set to '1', since each of signal levels R=0, 2G=0.6 and B=0.4 is stored in the memory 6 as color balance information, the arithmetic unit 7 calculates levels R=3, G=1, and B=1.5 as a relative gain with respect to the level of G from the signal level, and a color television camera 2 adjusts the white balance by multiplying each multiple of 3, 1 and 1.5 with an RGB signal obtained from the light of the light source 3 respectively and provides an output thereby adjusting the white balance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup device for a microscope, in which white balance control is performed in accordance with a change in light amount of a light source.

[0002]

2. Description of the Related Art It is known that when the light amount of a light source for a microscope changes, the color temperature changes and the white balance is lost. Therefore, as a conventional imaging device for this type of microscope, when the drive voltage of the lamp, which is the light source of the microscope, is adjusted, white balance control is performed in accordance with the change in the light amount using the correspondence table of the light amount and the color temperature characteristics. An image pickup device for a microscope which is designed to be used is known (Japanese Utility Model Laid-Open No. 2-126484).

[0003]

However, in the conventional image pickup device for a microscope, a correspondence table of the light quantity and the color temperature characteristic is provided to the outside of the microscope, for example, a lamp maker every time the lamp which is the light source of the microscope is replaced. There is a problem in that it must be requested and created.

The present invention has been made in view of the above problems, and even when the light source of the microscope is exchanged, a correspondence table of the light amount and the color temperature characteristic is created inside the microscope without depending on the outside. The purpose is to automatically adjust the white balance.

[0005]

In order to achieve this object, a microscope image pickup apparatus of the present invention comprises a light source light amount detecting means for detecting the light source light amount of a microscope and a color balance detecting means for detecting the color balance of the light source. And a white balance adjusting means for correcting the white balance according to the color balance detected by the color balance detecting means.

[0006]

In the image pickup apparatus for a microscope having the above-mentioned structure, the white balance is corrected according to the color balance detected by the color balance detecting means. The white balance can be automatically adjusted by creating a correspondence table between the light amount and the color temperature characteristic inside the.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block connection diagram showing an embodiment of an image pickup device for a microscope according to the present invention.

In FIG. 1, a color television camera 2 is mounted on top of a microscope 1. The light source 3 is a lamp used as a light source of the microscope 1, and the light amount is adjusted by the light amount adjusting device 4. The light quantity adjusting device 4 is composed of a variable resistor that is manually or automatically driven.

Reference numeral 5 is a light amount detecting device for detecting the light amount of the light source 3, and its output (for example, light amount levels 1 to 3 in Table 1)
Is recorded in a predetermined address of the memory 6. Color balance information (for example, signal level RGB in Table 1) corresponding to the light amount of the light source 3 is supplied from the color television camera 2 to the memory 6 and recorded at a predetermined address of the memory 6.

[Table 1]

The arithmetic unit 7 reads a predetermined address of the memory 6 and calculates the relative gain shown in Table 2. For example, when the light intensity level of the light source 3 is 1, the signal level R = 0.2 and the signal level G = 0.
6 and each signal level of signal level B = 0.4 are recorded in the memory 6, the arithmetic unit 7 calculates R from these signal levels as a relative gain based on G (green).
= 3, G = 1, and B = 1.5 are calculated and supplied to the color television camera 2. The color television camera 2 multiplies the RGB signals obtained with the light amount of the light source 3 (here, the light amount level 1) by magnifications of 3, 1, and 1.5, respectively, and outputs the white signal. Adjust the balance.

[Table 2]

[0012]

As described above, according to the image pickup apparatus for a microscope of the present invention, the white balance is corrected in accordance with the color balance detected by the color balance detecting means. Therefore, when the light source of the microscope is replaced, Also, it is possible to automatically adjust the white balance by creating a correspondence table of light quantity and color temperature characteristics inside the microscope without relying on the outside.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an embodiment of an image pickup apparatus for a microscope according to the present invention.

[Explanation of symbols]

 1 Microscope 2 Color Television Camera 3 Light Source 4 Light Intensity Adjustment Device 5 Light Intensity Detection Device 6 Memory 7 Computing Device

Claims (2)

[Claims] 1. A light source light amount detecting means for detecting a light source light amount of a microscope, a color balance detecting means for detecting a color balance of the light source, and a white for correcting white balance in accordance with the color balance detected by the color balance detecting means. An image pickup apparatus for a microscope, comprising: a balance adjusting unit. 2. A light source light amount scanning means for scanning the light source light amount of the microscope, and an output value of the light source light amount detecting means and the color balance detecting means when the light source light amount scanning means scans the light source light amount of the microscope. The white balance adjusting means reads out the color balance corresponding to the light source light amount detected by the light source light amount detecting means from the storage means and corrects the white balance. The imaging device for a microscope according to claim 1.