Image-capture-scope indication device for image-capture apparatus

An image-capture-scope indication device for an image-capture apparatus, comprising:

• a light source, the light source being fixed on a surface of the image-capture apparatus on which a lens of the image-capture apparatus is provided;
• a light ray selection member, the light ray selection member being provided in front of the light source and having a light transmission portion;
• a drive member, the drive member being configured for moving the light ray selection member so that a scope surrounded by light rays emitted from the light source and passing through the light transmission portion of the light ray selection member is consistent with an image-capture-scope of the image-capture apparatus;
• wherein the light rays emitted from the light source and passing through the light transmission portion of the light ray selection member has an outgoing angle B, and the outgoing angle B meets a relationship as below:
• B=arctan((u*tan A−d)/u);
• and
• A=2×arctan(D/2f)
• where u is an object distance;
• d is a distance between the light source and the lens of the image-capture apparatus;
• A is a visual angle;
• D is a length of a diagonal line of the negative of the image-capture apparatus, and f is a focus;
• and
• wherein:
• the image-capture-scope indication device further comprises a control member, and the control member is in signal connection with the drive member;
• and
• when the image-capture apparatus takes an image, the control member determines the outgoing angle B by calculation, and then controls the drive member to drive the light ray selection member to move according to the determined outgoing angle B.

An image-capture-scope indication device for an image-capture apparatus, comprising:

• a light source, the light source being fixed on a surface of the image-capture apparatus on which a lens of the image-capture apparatus is provided;
• a light ray selection member, the light ray selection member being provided in front of the light source and having a light transmission portion;
• a drive member, the drive member being configured for moving the light ray selection member so that a scope surrounded by light rays emitted from the light source and passing through the light transmission portion of the light ray selection member is consistent with an image-capture-scope of the image-capture apparatus;
• wherein the light rays emitted from the light source and passing through the light transmission portion of the light ray selection member has an outgoing angle B, and the outgoing angle B meets a relationship as below:
• B≈2*arctan(D/2f)
• where D is a length of a diagonal line of the negative of the image-capture apparatus, and f is a focus;
• and
• wherein:
• the image-capture-scope indication device further comprises a control member, and the control member is in signal connection with the drive member;
• and
• when the image-capture apparatus takes an image, the control member determines the outgoing angle B by calculation, and then controls the drive member to drive the light ray selection member to move according to the determined outgoing angle B.