Blood flow measuring apparatus
AssigneeCanon Kabushiki Kaisha
InventorShigeaki Ono
Life of this patent
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Abstract
There is disclosed a blood flow measuring apparatus in which a system control unit sends outputs for controlling the start and end of the measurement to optimum gain calculation units which calculate the optimum gains of photomultipliers for receiving the light reflected from the eye fundus and the system control unit controls whether the optimum gains are outputted or not. Also the optimum gain calculation unit respectively supply the system control unit with outputs for monitoring whether the setting of the optimum gain has been completed or not, whereby the system control unit discriminates whether the photomultipliers have been set at the optimum gains.
Claims22
A blood flow measuring apparatus comprising:
- irradiation means for irradiating a vessel on an eye fundus with a laser light;
- light receiving means for receiving a reflected light of said laser light;
- and
- calculation means for starting the calculation of an optimum gain for said light receiving means in synchronization with the start of irradiation by said irradiation means.
A blood flow measuring apparatus comprising:
- tracking means for tracking a vessel image on an eye fundus;
- light receiving means for receiving light from the vessel;
- and
- calculation means for starting calculation of an optimum gain for said light receiving means in synchronization with the start of tracking.
An ophthalmic apparatus comprising:
- illumination means for illuminating an eye fundus area including a specified target region;
- detection means for detecting light from said specified region;
- tracking means for tracking the movement of the eye fundus, utilizing the detection signal of said detection means;
- tracking start input means for providing an input signal for starting the tracking of said tracking means;
- gain determination means for determining the amplification gain of said detection means;
- and
- control means for executing in succession a first step of causing, in response to the input signal of said tracking start input means, said gain determination means to determine the gain of said detection means, and a second step of starting the tracking by said tracking means with the gain determined by said first step.
An ophthalmic apparatus comprising:
- illumination means for illuminating an eye fundus area including a specified target region;
- image taking means for taking the image of said specified region thereby outputting an image signal;
- process condition determination means for determining a process condition based on a signal in the vicinity of said specified region, contained in the output signal of said image taking means or in the result obtained by processing said output signal;
- region extraction means for extracting said specified region according to said process condition determination means;
- and
- auto tracking means for executing automatic tracking of said specified region, based on the output of said region extraction means.
An ophthalmic inspecting apparatus comprising:
- illumination means for illuminating an eye fundus area including a specified target region;
- image taking means for taking the image of said specified region thereby outputting an image signal;
- process condition determination means for determining a process condition based on a signal in the vicinity of said specified region, contained in the output signal of said image taking means or in the result obtained by processing said output signal;
- region extraction means for extracting said specified region according to said process condition determination means;
- display means for displaying the result of processing by said process condition determination means;
- and
- auto tracking means for executing automatic tracking of said specified region, based on the output of said region extraction means.
Dependencies are inferred from the claim text.