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Opto-Mechademics
United States
เข้าร่วมเมื่อ 15 พ.ค. 2022
I'm Mostafa Peysokhan, a dedicated educator and optomechanical engineer with a PhD in optics and over seven years of hands-on experience. Alongside my role at an interferometry company, I'm currently pursuing a master's degree in optomechanics at the University of Arizona.
With a background in physics and engineering, I've delved deep into the intricacies of light and its applications. Through this channel, I aim to share my expertise, spark insightful discussions, and provide educational resources in optics and optomechanics.
Join me on this journey as we explore the fascinating intersection of light and mechanics, uncovering the mysteries of optics one video at a time. Let's learn, innovate, and inspire together!
www.mpeysokhan.com/
www.linkedin.com/in/mpeysokhan/
scholar.google.com/citations?user=l_wAm-MAAAAJ&hl=en&oi=ao
With a background in physics and engineering, I've delved deep into the intricacies of light and its applications. Through this channel, I aim to share my expertise, spark insightful discussions, and provide educational resources in optics and optomechanics.
Join me on this journey as we explore the fascinating intersection of light and mechanics, uncovering the mysteries of optics one video at a time. Let's learn, innovate, and inspire together!
www.mpeysokhan.com/
www.linkedin.com/in/mpeysokhan/
scholar.google.com/citations?user=l_wAm-MAAAAJ&hl=en&oi=ao
A Comprehensive Guide to Calculating Lens Back Focal Length of Lens
oin us for a thorough exploration of lens optics in our latest tutorial, where we demystify the concept of back focal length. This video offers an accessible yet insightful journey into the calculation of back focal length, suitable for students, hobbyists, and professionals seeking a deeper understanding of optics.
We'll break down the back focal length equation into easy-to-follow steps, providing clear explanations and real-world examples along the way. Whether you're a photographer, physicist, or simply curious about optics, this tutorial will empower you to confidently calculate the back focal length for various lens setups, including thicker lenses.
By the end of this video, you'll have a solid grasp of lens mechanics and the practical applications of back focal length calculation. Don't miss out on this opportunity to enhance your optical knowledge - watch now and take your understanding of lens optics to the next level.
We'll break down the back focal length equation into easy-to-follow steps, providing clear explanations and real-world examples along the way. Whether you're a photographer, physicist, or simply curious about optics, this tutorial will empower you to confidently calculate the back focal length for various lens setups, including thicker lenses.
By the end of this video, you'll have a solid grasp of lens mechanics and the practical applications of back focal length calculation. Don't miss out on this opportunity to enhance your optical knowledge - watch now and take your understanding of lens optics to the next level.
มุมมอง: 247
วีดีโอ
Proving Compound Lens Focal Lengths
มุมมอง 1704 หลายเดือนก่อน
Embark on a journey into the fascinating world of optics as we delve into the rigorous proof behind compound lens focal lengths. In this video, we unveil the mathematical foundation that underpins the effective focal length equation for compound lenses. Through clear and concise explanations, we explore the lensmaker's formula and dissect each component to demonstrate how it contributes to the ...
Visual Axis
มุมมอง 1185 หลายเดือนก่อน
Investigating the visual axis, this video explores its role in defining the line connecting the fovea with the viewed object, essential for achieving optimal visual acuity and clarity.
Line of Sight
มุมมอง 425 หลายเดือนก่อน
This video discusses the concept of the line of sight, examining how it represents the straight path along which the eye is directed toward a specific object or point of interest in the visual field.
Eye's Optical Axis
มุมมอง 545 หลายเดือนก่อน
Exploring the fundamental concept of the eye's optical axis, this video elucidates its significance in understanding how light rays are focused onto the retina, thus forming clear and coherent visual images.
Purpose of the Pupillary Light Response
มุมมอง 265 หลายเดือนก่อน
This video elucidates the physiological and adaptive significance of the pupillary light response, detailing how changes in ambient light conditions trigger alterations in pupil size to regulate the amount of light entering the eye.
Depth of field and pupil size
มุมมอง 585 หลายเดือนก่อน
In this video, we delve into the relationship between depth of field and pupil size in the context of human vision, examining how changes in pupil diameter affect the range of distances that appear sharp in a visual scene.
Shape of the Obliquely Viewed Pupil
มุมมอง 275 หลายเดือนก่อน
This video explores the variations in the shape of the pupil when viewed obliquely, discussing the anatomical factors and optical principles behind such variations.
Age, Drug, Psychological and Pupil Size
มุมมอง 175 หลายเดือนก่อน
Welcome to an in-depth exploration of the multifaceted factors influencing pupil size. In this video, we delve into the intriguing interplay between age, drug effects, and psychological factors, unraveling their impact on the dynamics of pupil dilation and constriction. Pupil size serves as a window into the complex interactions between our physiological state and external stimuli. But how do a...
Consensual Light Reflex
มุมมอง 465 หลายเดือนก่อน
Welcome to a journey into the depths of ocular physiology. In this video, we unravel the complexities of the pupil consensual reflex, a phenomenon that reveals the remarkable synchronicity of our visual system. The pupil consensual reflex is a captivating aspect of vision, wherein both pupils react simultaneously to light stimuli, even when only one eye is exposed. But what triggers this synchr...
Field Size and Pupil Size
มุมมอง 545 หลายเดือนก่อน
In this video, we unravel the intricate relationship between fill light intensity and pupil diameter, uncovering the underlying principles through scientific investigation. Have you ever wondered how the amount of light in your environment affects the size of your pupils? It's a question that not only piques curiosity but also holds significant implications in fields such as ophthalmology, psyc...
Complete Guide to Understand Stops and Pupils of an Optical System
มุมมอง 5866 หลายเดือนก่อน
Description: Welcome to our comprehensive guide on the intricate workings of optical systems. In this enlightening video, we delve into the fundamental concepts of aperture stop, entrance pupil, and exit pupil, crucial elements in the realm of optics. Join us as we meticulously explore the methodology behind identifying the aperture stop within an optical system, unraveling the intricate layers...
Level of Illumination and Pupil Size
มุมมอง 316 หลายเดือนก่อน
In this video, we explore the relationship between illumination levels and their impact on pupil size, as well as the influence of temporal frequency on illumination. We delve into the Moon and Spencer (1944) equation, which provides insights into how varying levels of illumination affect the eye's response. Join us as we uncover the fascinating dynamics between light levels, pupil dilation, an...
PUPIL CENTRATION
มุมมอง 366 หลายเดือนก่อน
In this video, we delve into the phenomenon of pupil decentration within the human eye. Pupil decentration refers to the displacement of the pupil from its central position within the iris. We explore the factors influencing this displacement and its implications for visual perception and optical performance.
Eye Entrance and Exit Pupils
มุมมอง 3976 หลายเดือนก่อน
This video explores the concept of entrance and exit pupils in the context of the human eye, along with their associated parameters. Understanding these fundamental aspects of optical systems is crucial for comprehending how light interacts with the eye and influences vision.
Aperture stop, exit pupil, entrance pupil
มุมมอง 1.5K6 หลายเดือนก่อน
Aperture stop, exit pupil, entrance pupil
The Lens Refractive Index Distribution
มุมมอง 396 หลายเดือนก่อน
The Lens Refractive Index Distribution
The Lens Surface Radii of Curvature and Shapes
มุมมอง 306 หลายเดือนก่อน
The Lens Surface Radii of Curvature and Shapes
Radii of Curvature, Vertex Powers, and Total Corneal Power
มุมมอง 507 หลายเดือนก่อน
Radii of Curvature, Vertex Powers, and Total Corneal Power
Dear Sir, How did you learn Zemax?
So it's related to effective power right
Yeah the total effective power will change
Thank you😊
good and appreciative information, i'm also working as an optical engineer, and i have sent you connection on LInkedIn. I hope our Connection will good.
Subscribed Great tutorial
@@Qaidi_804 thanks
thanks for explaining accurate and easy
You're welcome
Thank you so much for this video, very helpful! Wish more people found out about it
Thanks for your comments
i can't see the ray diagram of how you got the different EPs positions, i just see you putting them on the diagram
Please watch the example after minutes 8:00, the position of the EP needs o be calculated. It is like imaging, you consider the apperture like an onject and image it thriugh the lens.
Very helpful, how to make the beam always in the center of the image plane after tilt the elements?
Can you elaborate more?
Really cool to have somebody go over the basics!
I am new to all of this, I am trying to understanf how to design a Maksutov-Cassegrain telescope in Zemax but cant find anything specific online
The Maksutov telescope is a kind of telescope that consist of a mirror and slightly curved lens. I highly recommend you to find a patent or an optical design close to what you want to make and from that point start optimizing it. Take a look at his papaer, it might be helpfull. You can also direclty email me for any question that I might be able to answer. Addolorata Marasco, Antonio Romano, Maksutov’s cameras and telescopes, International Journal of Engineering Science, Volume 45, Issue 1, 2007, Pages 34-40, ISSN 0020-7225, doi.org/10.1016/j.ijengsci.2006.07.014. (www.sciencedirect.com/science/article/pii/S0020722506002035)
@@opto-mechademics7234 thank you for your answer. I'll read the paper as soon as I can, I'll get in touch with you If I need. Thank you very much. To add a little bit more context, I have been assigned to ther optical payload development team for my group project, I need to design the optical instrument for a 3U cubesat for Earh observation, I already have the sensor and to achieve a 4m or less GSD I have been told to build a Maksutov telescope. It is the first time using Zemax Opticstudio for me.
@@opto-mechademics7234 Thank you very much for your answer. I'll read the paper later today. To add a little more context: I have been assigned to the optical payload system for my University group project, I have to design an instrument to mount in a 3U cubesat for Earth observation with a GSD of 4m or better. I already have the image sensor (Sony IMX342LQA) and I have been told that the best way to fulfill the requirenments is to adopt a Maksutov-Cassegrain telescope configuration. I have just started to use Zemax opticstudio from zero and was searching for basic tutorials. I'll get in touch with you if I have questions, thanks again.
Zemax has one of those in the built in examples! You can use it to try changing the elements and optimize!
@@testboga5991 today I'll try. The cubesat requires me to make the primary mirror a square and the secondary mirror a rectangle, have to find a way to do that too
can you give example how to make eye design in zemax sir
Hi Please watch this th-cam.com/video/S9RyHT_pg5U/w-d-xo.htmlsi=nFGNpRt7NsEZKu4X
@@opto-mechademics7234 how to combilne the design, opthalmoscope with the eye, simulate in zemax sir
thankyou for this video, i can learn alot to simulate in zemax
I'm delighted to hear that you're interested! If there are any other topics in optics and optomechanics you'd like to explore, please don't hesitate to let me know. I'd be more than happy to create a video on those subjects as well.
dear thankyou for the offer, can you give me example of design for smartphone fundus camera design in zemax, the combination of smartphone camera, light source of LED, lensa aspheric and human eye, i need to learn that thankyou dear@@opto-mechademics7234
dear, i need example how to make a optic design for smartphone fundus camera: align in one line: camera handphone, light source of LED, Aspheric Lens 20D, and human eye, this smartphone fundus camera is for take a picture of retina, thankyou so much dear @@opto-mechademics7234
If i am doing a bi convex lens followed by a plano concave lens, would i have a surface in between to establish the distance?
Hi, for the surface two of your biconvex lens just put the thickness as your distance. It is not very accurate, but accurate enough to give you the correct initial design. Theoretically, for a thick lens, you need to use the principal plane as representative of the location of your lens. Since your first lens is a biconvex lens the principal plane of your lens is at te center of your lens.
Hi mostafa, You are doing great. Like your videos. Can you share some videos on optomechanical designs, like various mounts both industrial and lab mounts, there differences. How to approach the design. Particularly mirror, lens and grating mounts.
Hi Thank you very much. Yeah that is my plan. I plan to make a whole series on precision mechanics and optomechanical design. Actually I am working as an optomechanical engineer, but I have a PhD. in optics. When I started this channel I wanted to just talk about precision machines and opto-mechanical design. But as it moves forward, some people asked me to upload more about optics. Definitely I will upload lots of video on optomechanical engineer design and tooling. What is your field?
Please watch this video for more details: th-cam.com/video/AYC8xuyILq8/w-d-xo.htmlsi=mQ1U4ETXfuwf_Qpg
Try to make the videos longer, if a subject is short add several chapters of the same theme in one single video. This subject is really interesting, you could research the optics of virtual reality googles, and how they affect eye accomodation etc...
Thanks for your comments 🙂
What a wonderful series. Thank you so much. Do you think can you create a system with 3-5 lenses? It would be great if possible.
Sure, I will provide more videos
Can the physical diameter of the size of the lens determines the actual entrance pupil in an optical system?
th-cam.com/video/AYC8xuyILq8/w-d-xo.htmlsi=mQ1U4ETXfuwf_Qpg Hey Maxwell, Please watch this video for more details
You are really doing well. Can you make a video by using a designed optical system in Zemax Opticstudio and use the “Scale” to scale it to your desired specifications and then do optimization? Would be very helpful.
Thanks Can you elaborate more. If you tell me the exact things that you want to do I might be able to help.
Very good explanation
Thanks
Good work. You are doing amazing job.
Thanks
Very good explanation Thanks
Glad you liked it
Super optic guide video ++
Hello ,What is the working distance of this system? Where do we find it?
As this system operates as an afocal system, it doesn't incorporate the CCD or the eye for the image plane, making it challenging to estimate the depth of field. To gauge the working distance, defined as the distance from the object to the front lens, it's necessary to estimate the depth of field on the CCD or the eye's retina. This estimation involves adjusting the object's position at a specific distance from the nominal point and observing the resultant impact on the spot size. When the image consistently maintains sharpness, this position represents the working distance of the lens.
@@opto-mechademics7234 Thank you so much information. Could you please upload a video explaining afocal design videos in detail, I would be very grateful.
@@john-vm8jt In order to have a good estimation I think I need to include the optical model of our eye also. I will try to model an optical model of eyes and then we can use it to optimize the afocal system together with healthy eyes.
@@opto-mechademics7234 I'm looking forward to the new video
I have a question, 1-do we calculate the diopter setting according to the concave lens? 2-Did we write eye relief in the thickness of the stop? (which is 20 mm or 50 ?) Thank you
The current setup is a basic system to begin with. To incorporate additional elements, we'll need to introduce more components. The advantage of the Galilean design, utilizing a concave lens as the eyepiece, lies in its simplicity and compactness. However, in the Keplerian system where a convex lens serves as the eyepiece, the resulting image is inverted, necessitating more optical elements to erect it. One potential solution involves the use of a Schmidt-Pechan prism to rotate the image by 180 degrees. Consequently, the system would consist of three primary elements: the objective lens, Schmidt-Pechan prism, and eyepiece. Creating an optical system from scratch can be challenging. I recommend exploring existing patents, papers, or similar systems as a starting point, and subsequently optimizing that system in Zemax for your specific needs.
@@opto-mechademics7234 Thank you for information !
Thank you so much for the video. that is very descriptive
Hi I am new in optical design, I wanna do it 3x monocular how to set 3x on zemax (which operand) and Should I afocal design ? Thank you
In an afocal system, the absence of a focal point is a defining feature. A useful approach is considering both the object and image at infinity, allowing us to determine the system's magnification, often given by the ratio of the second lens' focal length to the first (m = f2/f1). A rule of thumb for initial lens placement is a distance approximately equal to the sum of their focal lengths (d ≈ f1 + f2). However, optimization is key to refining the system's performance, addressing aberrations and enhancing image quality. I will work on a tutorial on designing an afocal lens system. This tutorial aims to illustrate the fundamental principles involved and provide step-by-step guidance, empowering individuals to navigate the intricacies of creating optimal afocal optical systems. Stay tuned for the tutorial's release.
@@opto-mechademics7234 Thank you so much information I am looking forward to new tutorials
@@opto-mechademics7234 how can I contact you ?
@@alpertunga4129 Hi the new video is uploaded. I hope you like it please let me know if you need furthur more help. th-cam.com/video/P2yXZ5VOJJ0/w-d-xo.htmlsi=OcvlRHs2b7XACVCV
Great video.