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<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt">Dear list,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt">we’d like to determine the focal distance in the HTC Vive Pro headset, in order to use exactly this distance for tests of visual acuity before the actual VR experiment.
An internet search produced a variation of estimates, ranging from 0.75 m to 2 m or even infinity. So we are wondering if someone here made optical measurements of the Fresnel lenses inside the Vive, to determine the effective focal distance of the display.
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE">Best<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE"> <o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE">Daniel
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE"> <o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE">---------------------------------<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE">Prof. Dr. Daniel Oberfeld-Twistel<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE">Johannes Gutenberg - Universitaet Mainz, Experimental Psychology &<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span lang="FR" style="font-size:11.0pt;mso-fareast-language:DE">Laboratoire ICube UMR7357 Université de Strasbourg<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE">Wallstrasse 3<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE">55122 Mainz<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt;mso-fareast-language:DE">Germany<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
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