diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/01.new-course-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/01.new-course-main/textbook.fr.md
index 305ebaeeb..ceac940f2 100644
--- a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/01.new-course-main/textbook.fr.md
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/01.new-course-main/textbook.fr.md
@@ -1,5 +1,7 @@
 ---
 title: 'nouveau cours : principal'
+published: false
+visible: false
 ---
 
 nouveau cours : principal
\ No newline at end of file