The app only recognized that the device was plugged in to my iPhone 14 one time. The camera appeared to work as expected. After that the app always reported that the device was not connected, even when the device was plugged in to the phone and its lights turned on. Attempts to change settings, reinstall software, unplug and re-plug, etc. failed. Cannot use the device at all.

Refraction is a well-known optical phenomenon that alters the direction of light waves propagating through matter. Microscopes, lenses and prisms based on refraction are indispensable tools for controlling light beams at visible, infrared, ultraviolet and X-ray wavelengths1. In the past few decades, a range of extreme-ultraviolet and soft-X-ray sources has been developed in laboratory environments2,3,4 and at large-scale facilities5,6. But the strong absorption of extreme-ultraviolet radiation in matter hinders the development of refractive lenses and prisms in this spectral region, for which reflective mirrors and diffractive Fresnel zone plates7 are instead used for focusing. Here we demonstrate control over the refraction of extreme-ultraviolet radiation by using a gas jet with a density gradient across the profile of the extreme-ultraviolet beam. We produce a gas-phase prism that leads to a frequency-dependent deflection of the beam. The strong deflection near to atomic resonances is further used to develop a deformable refractive lens for extreme-ultraviolet radiation, with low absorption and a focal length that can be tuned by varying the gas pressure. Our results open up a route towards the transfer of refraction-based techniques, which are well established in other spectral regions, to the extreme-ultraviolet domain.

Usee Plus camera

Lengeler, B. et al. A microscope for hard X-rays based on parabolic compound refractive lenses. Appl. Phys. Lett. 74, 3924–3926 (1999).

Semushin, S. & Malka, V. High density gas jet nozzle design for laser target production. Rev. Sci. Instrum. 72, 2961–2965 (2001).

Barillot, T. R. et al. Towards XUV pump-probe experiments in the femtosecond to sub-femtosecond regime: new measurement of the helium two-photon ionization cross-section. Chem. Phys. Lett. 683, 38–42 (2017).

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Liao, C.-T., Sandhu, A., Camp, S., Schafer, K. J. & Gaarde, M. B. Beyond the single-atom response in absorption line shapes: probing a dense, laser-dressed helium gas with attosecond pulse trains. Phys. Rev. Lett. 114, 143002 (2015).

Neidel, C. et al. Probing time-dependent molecular dipoles on the attosecond time scale. Phys. Rev. Lett. 111, 033001 (2013).

UseePlusWindows

Schütte, B., Arbeiter, M., Fennel, T., Vrakking, M. J. J. & Rouzée, A. Rare-gas clusters in intense extreme-ultraviolet pulses from a high-order harmonic source. Phys. Rev. Lett. 112, 073003 (2014).

To get estimated revenue of UseePlus app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.

Rupp, D. et al. Coherent diffractive imaging of single helium nanodroplets with a high harmonic generation source. Nat. Commun. 8, 493 (2017).

Manschwetus, B. et al. Two-photon double ionization of neon using an intense attosecond pulse train. Phys. Rev. A 93, 061402 (2016).

I left a previous review that said the side camera didn’t work using the app. I just did the update released today, and I figured out how to switch to the side camera if you have a dual lens Endoscope camera. The button on the cord which I thought was just for snapping pictures is also for switching cameras. A quick press will snap a picture. If you press, and hold it will switch. Very pleased with this app, and Endoscope camera now.

You buy a dual Lens $50 USB endoscope with two separate camera lenses one on the side one on the tap and this app only allows you to view the end camera very poorly put together. I just threw away $56 strongly recommend do not get this app.

He, X. et al. Spatial and spectral properties of the high-order harmonic emission in argon for seeding applications. Phys. Rev. A 79, 063829 (2009).

Wiese, W. L. Smith, M. W. & Miles, B. M. Atomic Transition Probabilities: Sodium through Calcium. Technical report, National Standard Reference Data System (NBS, 1969).

Wiese, W. L. Smith, M. W. & Glennon, B. M. Atomic Transition Probabilities: Hydrogen through Neon. Technical report, National Standard Reference Data System. (NBS, 1966).

Useeplusendoscope

Pan, H. et al. Low chromatic Fresnel lens for broadband attosecond XUV pulse applications. Opt. Express 24, 16788–16798 (2016).

Marr, G. V. Handbook on Synchrotron Radiation: Vacuum Ultraviolet and Soft X-ray Processes Vol. 2 (Elsevier, Amsterdam, 2013).

Useeplusalternative

Meijer, J.-M. et al. Observation of solid–solid transitions in 3D crystals of colloidal superballs. Nat. Commun. 8, 14352 (2017).

Any other app that takes photos and videos only need LIMITED ACCESS to save photos and videos. I wonder why this app want FULL ACCESS to ALL of your videos and photos.

Nature thanks J. Cryan, M. Gaarde and the other anonymous reviewer(s) for their contribution to the peer review of this work.

L.D. and B.S. performed the prism experiments. B.S. performed the lens experiments. O.K. carried out the simulations. All authors discussed the results and contributed to writing the manuscript.

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This app causes the endoscope to drop out all the time and the app times out. How can we use your product if the app doesn’t keep a connection?? Please fix it or give us another app we can use instead?? Thanks.

Heimann, P. et al. Compound refractive lenses as prefocusing optics for X-ray FEL radiation. J. Synchrotron Radiat. 23, 425–429 (2016).

Tzallas, P., Charalambidis, D., Papadogiannis, N. A., Witte, K. & Tsakiris, G. D. Direct observation of attosecond light bunching. Nature 426, 267 (2003).

Galbraith, M. C. E. et al. Few-femtosecond passage of conical intersections in the benzene cation. Nat. Commun. 8, 1018 (2017).

Valentin, C. et al. Spectral selection of high harmonics via spatial filtering. In High-Brightness Sources and Light-driven Interactions HW3A.3 (Optical Society of America, 2018).

Drescher, L. et al. Communication: XUV transient absorption spectroscopy of iodomethane and iodobenzene photodissociation. J. Chem. Phys. 145, 011101 (2016).

Wu, M., Chen, S., Camp, S., Schafer, K. J. & Gaarde, M. B. Theory of strong-field attosecond transient absorption. J. Phys. B 49, 062003 (2016).

🤔 The UseePlus app's quality is mixed. Some users are satisfied, while others report issues. Consider reading individual reviews for more context. Thanks for the vote

Takahashi, E. J., Lan, P., Mücke, O. D., Nabekawa, Y. & Midorikawa, K. Attosecond nonlinear optics using gigawatt-scale isolated attosecond pulses. Nat. Commun. 4, 2691 (2013).

Mauritsson, J. et al. Measurement and control of the frequency chirp rate of high-order harmonic pulses. Phys. Rev. A 70, 021801 (2004).

Useeplusreview

Santoro, G. et al. Use of intermediate focus for grazing incidence small and wide angle X-ray scattering experiments at the beamline P03 of PETRA III, DESY. Rev. Sci. Instrum. 85, 043901 (2014).

I’ve tried on both my iPhone and iPad. Plug it in camera light turns on but app says it’s disconnected. Try again and camera will work for a while but 100% of time you’ll lose connection while moving camera around. And to reconnect you have to unplug it from phone and re plug it in. Then maybe u get 30 seconds of use.

Chollet, M. et al. The X-ray pump–probe instrument at the Linac Coherent Light Source. J. Synchrotron Radiat. 22, 503–507 (2015).

Schafer, K. J. & Kulander, K. C. High harmonic generation from ultrafast pump lasers. Phys. Rev. Lett. 78, 638–641 (1997).

Default install settings give it full access to your iCloud Drive (if you are on iPhone). The only option is to switch it so it has full access to your phone—there is no option to allow it access to Photos only, or no access at all.

Useeplusiphone

Snigirev, A., Kohn, V., Snigireva, I. & Lengeler, B. A compound refractive lens for focusing high-energy X-rays. Nature 384, 49–51 (1996).

Baez, A. V. A self-supporting metal Fresnel zone-plate to focus extreme ultra-violet and soft X-rays. Nature 186, 958 (1960).

Wang, Y., Yun, W. & Jacobsen, C. Achromatic Fresnel optics for wideband extreme-ultraviolet and X-ray imaging. Nature 424, 50 (2003).

We thank A. A. Ünal and R. Schumann for their support with the laser systems. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie-Sklodowska-Curie grant agreement no. 641789 MEDEA.

Allaria, E. et al. Highly coherent and stable pulses from the Fermi seeded free-electron laser in the extreme ultraviolet. Nat. Photon. 6, 699–704 (2012).

Schroer, C. G. et al. Coherent X-ray diffraction imaging with nanofocused illumination. Phys. Rev. Lett. 101, 090801 (2008).

Useeplusipad

Gademann, G., Ple, F., Paul, P.-M. & Vrakking, M. J. J. Carrier-envelope phase stabilization of a terawatt level chirped pulse amplifier for generation of intense isolated attosecond pulses. Opt. Express 19, 24922 (2011).

This app forces you to give it full access to your photo library in order to save a photo. This is messed up and scammy to me.

Bengtsson, S. et al. Space–time control of free induction decay in the extreme ultraviolet. Nat. Photon. 11, 252–258 (2017).

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Works well with our otoscope, but would love the ability to add stickers to label Left or Right, or add text to the photos. Once I’m looking at them again later it’s hard to remember which side I was looking at!

Drescher, L., Kornilov, O., Witting, T. et al. Extreme-ultraviolet refractive optics. Nature 564, 91–94 (2018). https://doi.org/10.1038/s41586-018-0737-3