I've read that link. This theory applies to on-axis image formation. Even if a real image forms an observer has to be on-axis and behind the real image to see it. If one is off-axis and in front of the real image (between the real image and the mirror) then one doesn't see the real image. I...
Hi,
I am working on a project for a near-eye display where I need to magnify and project far out a real image using a mirror. I have some off the shelves mirror that I am experimenting with but I can't seem to get any perceived magnification at all when I use a concave mirror. To illustrate the...
Thank you for the reply. My background is not in optics so if I understand correctly what you explained is that a compact fresnel reflector will have specular reflection at each section except at the edges/steps where the light will diffract, correct?
I found this video on this company's...
Hi,
I have an imaging application, where a mirror with dimensions of 120x80mm at an angle of approximately 50 degrees to the mounting surface reflects a real image at approximately 11 degrees angle of incidence. Due to space limitations I need to reduce the height of the mirror. I was thinking...
I would like to use a pentaprism with some amount of magnification. The pentaprism will be used to reflect a real image at 90 degrees angle but I also want the reflected image to appear larger. The distance between the prism and the real image is about 70cm. The pentaprism has two reflecting...
If I shorten the distance between the object and the mirror to less than the focal length (i.e. 30cm) I see a very similar virtual image as expected. As I increase the distance the image remains upright. Also the mirror is a two way mirror so I can more easily tell that the image is formed...
I have a spherical concave mirror with focal length of 65cm, radius of curvature of 130cm. I hold the mirror close to the eye at approximate 45 degrees and I reflect an object below it as shown in the image.
The distance between the object and the mirror is 90cm, that is more than the focal...
Hi Sophie,
Thank you for the reply and for the suggestions. Your comments are good. Let me try to answer your questions. I made an updated illustration:
The observer looks at a lens and sees a reflection of the real image. The blue line represents the ray diagram from the real image...
I am a using a mirror to reflect an image at an angle of incidence of 10 degrees. The mirror is also at an angle of incidence of approximately 30 degrees from the viewer and it creates undesired reflections when looking at the mirror. Here is a diagram illustrating the situation.
I am looking...
I thought in optics there are two sources, a point source and an extended source. A point source is single point while an extended source is a collection of points. The phone being larger than a single point (a collection of pixels that emit light, each pixel being a point source itself) would...
I need to collimate an extended source (for example a cell phone) to infinity or as far as possible. I show an illustration below
The collimator lens is about 2cm from the eye and the extended source is about 60cm from the eye. My understanding is that a collimator lens with a focal length...
TIR and prisms were my first thought as well but I wanted to ask on this forum in case there is another technology that I had not thought of.
The application involves the entire visible spectrum not just the a specific wavelength.
I am looking for an optical piece that can act as a mirror when the angle of incidence is close to normal (90 degrees) but acts as a see-through glass when the angle of incidence is less than 60 degrees?
Alternatively it can be a filter placed in front of a mirror that passes a lot of light at...
I have google it and a ray diagram for an object located beyond the focal length of a concave mirror should produce an inverted image like shown below.
What happens in my case is that the image is upright. So I am guessing that the focal length listed for this mirror refers to something else?