diff --git a/_pages/about.md b/_pages/about.md index 20218a1..5142b60 100644 --- a/_pages/about.md +++ b/_pages/about.md @@ -36,7 +36,7 @@ easily to conferences and outreach events. The BabyCAT project was designed in 2019 by a team of scientists at the [Russell B. Makidon Optics Laboratory](https://www.stsci.edu/stsci-research/research-topics-and-programs/russell-b-makidon-optics-laboratory) -at the [Space Telescope Science Institite](https://www.stsci.edu/). +at the [Space Telescope Science Institute](https://www.stsci.edu/). Its goal is to make advanced optical techniques more accessible to a wider audience. The first ever BabyCAT coronagraph demonstration bench was built in 2019 and has since been used in various educational @@ -49,8 +49,8 @@ who worked with the RMOL team and STScI's Office of Public Outreach (OPO) during "High-contrast imager for Complex Aperture Telescopes" testbed. Since the demo coronagraph was supposed to illustrate a mini version of HiCAT, the name "BabyCAT" seemed immediately evident. -The second demo bench, BabyCAT 2.0, was also assembled at the Makidon lab and later delivered to ExEP at JPL. Its -upgraded design is the one that is presented on this website. +The second demo bench, BabyCAT 2.0, was also assembled at the Makidon lab and later delivered to ExEP at NASA's Jet +Propulsion Laboratory (JPL). Its upgraded design is the one that is presented on this website. ## Where This Setup Is Used diff --git a/_pages/assembly.md b/_pages/assembly.md index 99ff332..1d3975d 100644 --- a/_pages/assembly.md +++ b/_pages/assembly.md @@ -40,7 +40,7 @@ In this setup, the three optical elements 1-3 (OE1, OE2, OE3) are spherical mirr ![Optical Layout](/assets/images/BabyCAT_unfolded.png){: .align-center} -Below, you can see close-up images of the reflective focal-plane mask (left) and the Lyot stop iris (right) on their respective magnetic +Below, you can see close-up images of the reflective focal-plane mask (FPM, left) and the Lyot stop (LS) iris (right) on their respective magnetic mounts. FPM and LS{: .align-center} @@ -58,14 +58,14 @@ The below is a schematic of the general layout of the demo coronagraph. [Download PDF](https://github.com/ivalaginja/babycat/tree/main/assets/pdfs/assembly_outline.pdf){: .btn .btn--danger} The alignment of the demo coronagraph requires some familiarity with standard optical alignment techniques and the use -of standard optics mounts, as well as good judgment as to when PSFs and images are in good focus. For cost reasons, most +of standard optics mounts, as well as good judgment as to when point-spread functions (PSFs) and images are in good focus. For cost reasons, most mounts in BabyCAT do not have adjustment actuators. As a result, adjustments have to be made by carefully sliding mounts across the breadboard and by sliding posts up and down in post holders. Care is required when performing these movements and when screwing down mounts in their final location. -The final goal is a demonstration that is visually instructive regarding the operation of a coronagraph for exo-planet +The final goal is a demonstration that is visually instructive regarding the operation of a coronagraph for exoplanet imaging. Precision alignments may not strictly be necessary to achieve this. However, experience has shown that some -care and finesse is needed to align the system well. Otherwise, there will be appreciable aberrations (primarily +care and finesse are needed to align the system well. Otherwise, there will be appreciable aberrations (primarily astigmatism) visible in the system PSF and the “star” light will not be effectively rejected. It is also possible to have a system that is nearly aligned, but a mechanical interference presents itself when attempting to, for example, perform final focusing on the Lyot stop. Multiple iterations of the alignment procedure may be required to achieve good @@ -99,7 +99,7 @@ helps reduce angles of incidence and minimize astigmatism. (Note that in an alre 5. Adjust the lateral position of the FPM to align the beam with the pinhole. 6. Adjust pupil camera such that it is perpendicular to the beam path. Use a transmissive paper to establish beam path and ease centering on the camera. -7. Adjust pupil camera to establish best focus, using the sharpness of PSF edges as a guide. +7. Adjust pupil camera to establish best focus, using the sharpness of pupil edges as a guide. ### Refocusing the focal-plane mask @@ -108,15 +108,15 @@ disassembled and repositioned. Note that moving the FPM changes the conjugates ( spherical mirror and final imaging optic. 1. Disassemble the imaging backend. -2. Insert a pickoff (flat) mirror and re-imaging lens to acquire an image of the back of the FPM. -3. The camera can be brought to focus by finding the plane in which the PSF is best-focused (which will be conjugate to the best focus of the FPM.) +2. Insert a pick-off (flat) mirror and re-imaging lens to acquire an image of the back of the FPM. +3. The camera can be brought to focus by finding the plane in which the PSF is best-focused (which will be conjugate to the best focus of the FPM). 4. Adjust the FPM position to maintain centering and bring the edges into focus. -5. Re-align the imaging backend (may take ~ 1 hour). +5. Re-align the imaging backend (may take ~1 hour). ## Assembly images Below you can find a couple of images of the assembled BabyCAT and BabyCAT2 benches. The assembly with a grey frame is -BabyCAT, and the assembly with a black frame is the evolved BabyCAT2, on which the parts list on this website is based on. +BabyCAT, and the assembly with a black frame is the evolved BabyCAT2, on which the parts list of this website is based on. Keep in mind that the assembly images are for reference only and may not be the most up-to-date version of the benches. For example, the images of BabyCAT show the green laser listed in the parts list, while the images of BabyCAT2 show a diff --git a/_pages/parts-list.md b/_pages/parts-list.md index 58bad71..3b5a45d 100644 --- a/_pages/parts-list.md +++ b/_pages/parts-list.md @@ -7,8 +7,7 @@ sidebar: nav: "parts" --- -This page lists all the parts required to build the portable coronagraph. The list is divided into several categories -listed in the navigation bar on the left. +This page lists all the parts required to build the portable coronagraph. To build a fully functional coronagraph bench, you will need all components from the two sections [Optical Components](#optical-components) and [Screws and tools](#screws-and-tools). Note how for the screws, you could diff --git a/assets/pdfs/assembly_outline.pdf b/assets/pdfs/assembly_outline.pdf index 36dacf2..b3d3552 100644 Binary files a/assets/pdfs/assembly_outline.pdf and b/assets/pdfs/assembly_outline.pdf differ diff --git a/index.md b/index.md index e0e9e27..542d4fe 100644 --- a/index.md +++ b/index.md @@ -8,7 +8,7 @@ header: actions: - label: "Get parts list" url: /parts-list/ - caption: "Photo credit: [**R. Soummer**]" + caption: "Photo credit: **R. Soummer**" excerpt: "A portable coronagraph bench." intro: - excerpt: 'Welcome to the BabyCAT website! BabyCAT is a portable coronagraph bench designed to interactively demonstrate coronagraphy. You can download a full parts list and build your own BabyCAT - make sure to let us know if you do!'