Inopticalsolutions Publications
(download some of these papers from ResearchGate HERE)
(check out public data, posters, and notes on Figshare HERE)
- R. Siew, "Flat Field Curvature Using Flat Metalenses," (Open Access Presentation, Rev. 2, Sep 22, 2025). Updates with corrections have been added into the description of this slide deck in the above link to Figshare.
- Short slide presentation on "Image Irradiance as a Function of Object Distance" (June 19, 2025); Watch THIS VIDEO on YouTube for further insights
- R. Siew, "Two-component 'anti-zoom' lens system" (open access technical note, May 28, 2025)
- R. Siew, "What is an 'anti-zoom lens'?" (open access presentation, May 26, 2025)
- R. Siew, "Relative illumination of a projection lens when used with a light pipe," (open access poster with Zemax files for download, May 18, 2025)
- R. Siew, "Zoom lens design with fixed front and back focal planes for structured illumination microscopy," App. Opt. 64(6), pp. 1479-1484 (2025)
- R. Siew, "Breaking Down the Metalens Phase Profile," Open Access Slides (June 12, 2024)
- R. Siew, "An instance of negative variance-like components in optics by way of applying multivariable calculus to a statistical problem," Journal of Statistics and Management Systems (March 30, 2024).
- R. Siew, "Optical engineering perspective on normalizing Ct values across real-time PCR instruments and platforms: a response to "Monkeypox: a test for PCR," Personal Commentary (open access). Sep-07-2022.
- R. Siew, "Breaking Down the Etendue," Inopticalsolutions Mini-Presentation (March 21, 2022)
- R. Siew, "Image irradiance in the absence of aplanatism and isoplanatism," Eur. J. Phys. 43 035304 (March 18, 2022)
- R. Siew, "Fluorescence Microscopy with Flat Field Illumination using LEDs and Off-The-Shelf Spherical Lenses," Inopticalsolutions White Paper, July 28, 2021 (OPEN-ACCESS ARTICLE)
- R. Siew, "Wavefront Coding and 'in-situ' Deconvolution with a Canonical Optical Processor," Inopticalsolutions Technical Discussion, June 20, 2021 (OPEN-ACCESS DISCUSSION-TYPE ARTICLE)
- R. Siew, "Relative Illumination and Image Distortion Part 2: how to "sense" the entrance pupil," Inopticalsolutions Technical Note, Dec 25, 2020 (OPEN-ACCESS ARTICLE)
- R. Siew, "Uniform Top Hat Illumination for Extended Sources Using Only Spherical Lenses," Inopticalsolutions White Paper, Nov 14, 2020 (OPEN-ACCESS ARTICLE)
- R. Siew, "How to use spherical optics to create uniform top hat illumination," Zemax Envision 2020 (October 7, 2020); Click HERE for a citable version.
- R. Siew, "Uniform illumination using spherical lenses," (open-access rejected manuscript, first submitted on Jul 13, 2020; rejected on Sep 27, 2020; posted on Figshare on Oct 1, 2020)
- R. Siew, "Variable focus machine vision lens without moving parts: freeform progressive eyeglasses for non-humans," in Imaging and Applied Optics Congress, OSA Technical Digest (Optical Society of America, 2020), paper ITh4E.4
- R. Siew, Monte Carlo Simulation and Analysis in Modern Optical Tolerancing, (SPIE Press, Bellingham, Washington, 2019)
- R. Siew, "Breaking Down The 'Cosine Fourth Power Law'", Photonics Online (OPEN ACCESS ARTICLE, March 17, 2019)
- R. Siew, "Relative illumination and image distortion," Opt. Eng. 56(4), 049701 (Mar 31, 2017)
- R. Siew, "Distinction between image magnification and irradiance magnification: a commentary," Opt. Eng. 56(2), 029701 (Feb 14, 2017)
- R. Siew, "Practical automated glass selection and the design of apochromats with large field of view," App. Opt. 55, pp. 9232 - 9236 (2016)
- R. Siew, "Axial nonimaging characteristics of imaging lenses: discussion," J. Opt. Soc. Am. A 33, pp. 970 - 977 (2016)
- OPEN ACCESS TECHNICAL NOTE: Variable focus machine vision lens without moving parts: freeform progressive eyeglasses for non-humans (slides prepared for the OSA Imaging & Applied Optics Congress, online, June 25th, 2020, 3:30 pm - 3:45 pm Pacific Daylight Time, session title: Imaging and Display Optics I)
- OPEN ACCESS TECHNICAL NOTE: Progressive lens approach to variable focus without moving parts in electronic imaging systems
- OPEN ACCESS TECHNICAL NOTE: Do "intrinsic" negative variance components exist for population variances of stochastic physical parameters?
- OPEN ACCESS TECHNICAL NOTE: Intrinsic negative variance components: errata
- OPEN ACCESS TECHNICAL NOTE: Intrinsic negative variance components: case of non-normal functions of random variables
Selected Past Publications
- R. Siew, "Analysis of biocular images using 3D glasses and Zemax: A plausible approach," Zemax Knowledge Base, August (2012), (OPEN ACCESS)
- R. Siew, "Corrections to classical radiometry and the brightness of stars," Eur. J. Phys. 29, pp. 1105 - 1114 (2008)
- R. Siew, "f/no. and the radiometry of image forming optical systems with non-circular aperture stops," in Optical Modeling and Performance Predictions II, ed. Mark A. Kahan, Proc. SPIE 5867 (2005)
- R. Siew, "Partial coherent imaging using the Grating Light Valve," in Optical Scanning 2002, eds. Stephen F. Sagan; Gerald F. Marshall; Leo Beiser, Proc. SPIE 4773 (2002)