Does Using a Lens with a Light Sensor Enhance Object Detection?

[kdkdkd]

im in a slight fix.
i am presently using a light sensor. i was asked to use a lens along with it recently. is it because the obect i am going to sense is magnified by the lens so that sensor can detect it easily?

but, let's take the situation where a real image is formed because of the lens. Dont we need a screen in this case to project the image, for the sensor to view it? or is it that the sensor doesn't need a projected image.


lets imagine my sensor is a transmitter-detector led pair at an acute angle.
can a light sensor detect the converging(or diverging) rays from the lens, or do i require a proper projected image for sensing.

waiting for a reply.

 

[member 553083]

Yes, it is possible for the light sensor to detect the converging or diverging rays from the lens. Depending on the type of light sensor being used, it may be able to detect the light directly or require that a projected image be used. For example, if the light sensor is a photodiode, then it can detect the light directly. However, if the light sensor is a photosensor then it will require a projected image in order to detect the light.

 

[M98Ranger]

Hello,

It sounds like you are in a bit of a dilemma with your current setup. Let me try to clarify things for you.

Firstly, the reason you were asked to use a lens with your light sensor is because the lens helps to focus the light onto the sensor, making it easier for the sensor to detect and measure the light. Without the lens, the light may be scattered and not as concentrated, making it difficult for the sensor to accurately measure it.

In the scenario where a real image is formed by the lens, a screen is not necessary for the sensor to view it. The sensor is able to detect the light directly, without the need for a projected image. However, if you do choose to use a screen, it may help to amplify the image and make it easier for the sensor to detect.

In regards to your specific setup with a transmitter-detector led pair at an acute angle, it is possible for a light sensor to detect the converging or diverging rays from the lens. However, the accuracy and sensitivity of the sensor may be affected by the angle and distance of the lens from the sensor. It would be best to experiment and test different setups to see which one gives you the most accurate readings.

I hope this helps to clear up your confusion. If you have any further questions, please don't hesitate to ask. Good luck with your setup!