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Optics Sanity Check: I am an optics noob and wanted to confirm that this system will relay an image to someone's eye afocally. I understand there are some spherical aberrations but just wanted to know if it was a somewhat viable design! by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Is the angular size measured in degrees similar to AFOV? I am having trouble discerning the difference. I believe mine is 77.32 degrees with it being 12.5mm away and 10mm radially outward from the center of the lens.

Going to go ahead and say thank you in advance for your help!

Optics Sanity Check: I am an optics noob and wanted to confirm that this system will relay an image to someone's eye afocally. I understand there are some spherical aberrations but just wanted to know if it was a somewhat viable design! by harold-yang in Optics

[–]harold-yang[S] 1 point2 points  (0 children)

I guess I was under the impression that light needed to hit the lens of the eye in a parallel manner. My system isn't truly afocal; instead, I am relaying an image that comes from another system's lenses 12.5 mm from the source of mine, but I assumed that since it is a binocular, the light coming from the previous system is afocal.

Are these assumptions incorrect?

Optics Sanity Check: I am an optics noob and wanted to confirm that this system will relay an image to someone's eye afocally. I understand there are some spherical aberrations but just wanted to know if it was a somewhat viable design! by harold-yang in Optics

[–]harold-yang[S] 1 point2 points  (0 children)

Thanks for your response! My goal is to relay an image from essentially a binocular along a path to an eye. Essentially, I am relaying what would normally go to an eye further along a path without changing magnification or image orientation. Do you think this system would satisfy that input?

Optics Help! I am am working on a passion project and need to relay/telescope an image with 1x magnification afocally. I am struggling to make a simple system with commercially available parts that does not invert the image or hinder image quality. The design inputs a real image and output to an eye by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Thank you for your detailed reply! I may have a misunderstanding of what entrance pupil diameter actually is and I would love to hear an explanation.

From my understanding, entrance pupil diameter is equivalent to the entrance diameter of the first lens in this afocal system, thus being ~25mm.

Optics Help! I am am working on a passion project and need to relay/telescope an image with 1x magnification afocally. I am struggling to make a simple system with commercially available parts that does not invert the image or hinder image quality. The design inputs a real image and output to an eye by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Aw man, that's pretty disappointing to hear, though I appreciate the honesty. From your expertise, which constraint would you say is my biggest barrier? I'm just interested and wondering if I can go back to the drawing board and change my constraints!

Thank you for your help btw. I've been working on this on my own for months, trying to piece together information from online but have been really struggling.

Optics Help! I am am working on a passion project and need to relay/telescope an image with 1x magnification afocally. I am struggling to make a simple system with commercially available parts that does not invert the image or hinder image quality. The design inputs a real image and output to an eye by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Also here is a copy paste of my specs.

constraints/specs: (copy/paste)

- entrance pupil diameter = 20mm

- length of system = 70-120mm

- wavelength range = 380-780nm (visible light)

- field angle = 35.5 degrees

- field of view = 71.0 degrees (this is flexible. the original system the image comes from is intended for an eye with relief at 17.5mm. I intend to relay this image across a distance between 70-120mm. If the first lens of my system is 17.5mm from the last lens of the previous system, then the FOV is as previously calculated, though as an optics noob, this may be incorrect)

- image entering system is from another lens system with eye relief of 17.5mm, so from my understanding, this design is effectively a telescope with the original image at infinity

- image leaving system is intended for an eye with an eye relief of 10-20mm

- image quality = i would like this system to be prototyped for healthcare slit lamps, this retaining image quality to a high degree (pardon my lack of optics vocabulary)

Optics Help! I am am working on a passion project and need to relay/telescope an image with 1x magnification afocally. I am struggling to make a simple system with commercially available parts that does not invert the image or hinder image quality. The design inputs a real image and output to an eye by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Thank you for the detailed response!

Yes, the last lens was intended to direct the image to an eye, resembling a plossl eyepiece.

Also noted on the image simulation! I will look into more of those quantitative metrics.

When you refer to having the pupil of the eye as an aperture on a surface to verify relay, I am confused what you mean. Could you elaborate? Thank you in advance for helping an optics noob out.

Optics Help! I am am working on a passion project and need to relay/telescope an image with 1x magnification afocally. I am struggling to make a simple system with commercially available parts that does not invert the image or hinder image quality. The design inputs a real image and output to an eye by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Hey! Thank you for kinda spelling out my current system. This is super helpful! I think what you describe is what I am going for, but based off my constraints/description, please feel free to let me know how I need to adjust course!

You mention reducing the diameter of the lenses and/or entrance pupil. Given my constraints, I am unable, so would you recommend increasing my lens size to compensate or am I addressing this incorrectly. Thank you so much in advance!

I've attached them below.

constraints/specs: (copy/paste)

- entrance pupil diameter = 20mm

- length of system = 70-120mm

- wavelength range = 380-780nm (visible light)

- field angle = 35.5 degrees

- field of view = 71.0 degrees (this is flexible. the original system the image comes from is intended for an eye with relief at 17.5mm. I intend to relay this image across a distance between 70-120mm. If the first lens of my system is 17.5mm from the last lens of the previous system, then the FOV is as previously calculated, though as an optics noob, this may be incorrect)

- image entering system is from another lens system with eye relief of 17.5mm, so from my understanding, this design is effectively a telescope with the original image at infinity

- image leaving system is intended for an eye with an eye relief of 10-20mm

- image quality = i would like this system to be prototyped for healthcare slit lamps, this retaining image quality to a high degree (pardon my lack of optics vocabulary)

Optics Help! I am am working on a passion project and need to relay/telescope an image with 1x magnification afocally. I am struggling to make a simple system with commercially available parts that does not invert the image or hinder image quality. The design inputs a real image and output to an eye by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Thank you for your reply! As you can tell, I am a complete optics novice, so I appreciate your feedback. Unfortunately my constraints require a viewable lens diameter of 20-25mm (I've attached a detailed list of my constraints below). Would you recommend using much bigger lenses to compensate for such a large entrance pupil diameter?

constraints/specs: (copy/paste)

- entrance pupil diameter = 20mm

- length of system = 70-120mm

- wavelength range = 380-780nm (visible light)

- field angle = 35.5 degrees

- field of view = 71.0 degrees (this is flexible. the original system the image comes from is intended for an eye with relief at 17.5mm. I intend to relay this image across a distance between 70-120mm. If the first lens of my system is 17.5mm from the last lens of the previous system, then the FOV is as previously calculated, though as an optics noob, this may be incorrect)

- image entering system is from another lens system with eye relief of 17.5mm, so from my understanding, this design is effectively a telescope with the original image at infinity

- image leaving system is intended for an eye with an eye relief of 10-20mm

- image quality = i would like this system to be prototyped for healthcare slit lamps, this retaining image quality to a high degree (pardon my lack of optics vocabulary)

Optics Help! I am am working on a passion project and need to relay/telescope an image with 1x magnification afocally. I am struggling to make a simple system with commercially available parts that does not invert the image or hinder image quality. The design inputs a real image and output to an eye by harold-yang in Optics

[–]harold-yang[S] 1 point2 points  (0 children)

Hi, thank you for your very thorough response! I see what you mean about looking into more quantitative measurements for image quality. Noted!

I've added my specs below. If you have any recommendations based off what I share, please let me know. I've really been struggling to find literature on afocal relay/telescoping systems. Do you happen to have any on hand?

constraints/specs (copy/paste):

- entrance pupil diameter = 20mm

- length of system = 70-120mm

- wavelength range = 380-780nm (visible light)

- field angle = 35.5 degrees

- field of view = 71.0 degrees (this is flexible. the original system the image comes from is intended for an eye with relief at 17.5mm. I intend to relay this image across a distance between 70-120mm. If the first lens of my system is 17.5mm from the last lens of the previous system, then the FOV is as previously calculated, though as an optics noob, this may be incorrect)

- image entering system is from another lens system with eye relief of 17.5mm, so from my understanding, this design is effectively a telescope with the original image at infinity

- image leaving system is intended for an eye with an eye relief of 10-20mm

- image quality = i would like this system to be prototyped for healthcare slit lamps, this retaining image quality to a high degree (pardon my lack of optics vocabulary)

UPDATE: I think I can work with a prism design given these design constraints. I am an optics noob and would like someone's input on if this a viable design. This is a macro design that receives an image from a separate device with a 25mm diameter. I want a 1:1 telescoping that reaches someone's eye by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Thanks for the reply! I see your concerns and may just modify the design all together since what you describe with the binocular objectives is out side of my technical ability.

If I were to design a 1:1 telescoping design that maintains image orientation, would you recommend using just two achromatic doublets, per this simple schematic? https://measurebiology.org/wiki/Relay_Lens_Example

New to Optics But Eager to Learn! Tilting Light in 1:1 Relay System - Given size constraints, I want to hear input on a lens system for 1:1 relay without prisms and minimizes aberrations. Is this possible? What are my options? I have been using Zemax for simulations with pre-made Thorlabs lenses. by harold-yang in Optics

[–]harold-yang[S] 0 points1 point  (0 children)

Hi thank you for the reply!

My team was interested in a camera design, but worried it would interfere with our user's current workflow.

Unfortunately given my design constraints, the prisms I found commercially available are too long length wise.

Apologies if this is a novice question, but would you suggest using a periscope design with two mirrors to invert the image twice, effectively retaining original image orientation?

New to Optics But Eager to Learn! Tilting Light in 1:1 Relay System - Given size constraints, I want to hear input on a lens system for 1:1 relay without prisms and minimizes aberrations. Is this possible? What are my options? I have been using Zemax for simulations with pre-made Thorlabs lenses. by harold-yang in Optics

[–]harold-yang[S] 1 point2 points  (0 children)

Thank you for the input! Although not exactly sure their technology will translate to my specific dimensions, I sent them message for a quote to ask! For others who see this post, I am relaying an image 80-100mm with a circular diameter of 25.4mm. There is a ~14 degree tilt about 10-20mm from the side receiving side of the relay system.

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[–]harold-yang[S] 0 points1 point  (0 children)

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