Patent ID: 11962933
Assignee: SAINT-GOBAIN GLASS FRANCE
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H  B | IPC B  H

Claim 0:
1. A device, comprising:
a vehicle glazing of given thickness E1, the vehicle glazing having an outer main face oriented outward and an inner main face on a vehicle interior side, the vehicle glazing comprising, in a peripheral zone, a through-hole between the inner main face and the outer main face, the through-hole being delimited by a side wall of the vehicle glazing,
in said through-hole, an insert made of a material that is transparent in a range A of wavelengths in an infrared spectrum beyond 2.5 μm, ranging at least from 9.5 to 10.5 μm, the insert being of given thickness e, made of a material of refractive index n in the range A, with an input face oriented toward the vehicle interior and an output face, the input face fitting within a rectangle or square of width Wi and height Di with aspect ratio Di/Wi of at least 0.8 and of at most 1.2, with Di at most 35 mm, defining a center O which is an intersection of the diagonals of said rectangle,
a thermal camera, disposed on the inner main face side so as to receive an electromagnetic radiation after passing through said insert, the thermal camera comprising an input pupil, with a height p, and an infrared detection system in a range A and a lens, the camera being defined by:
an optical axis X′ passing through a center C of the pupil, C facing the insert,
a vertical viewing angle θ of at least 10°,, the thermal camera being of given volume defined by a point of contact T capable of touching the vehicle glazing first, or a plate on the inner main face of the vehicle glazing, or the insert, or a piece in a peripheral environment of said vehicle glazing, in position mounted in a vehicle,, an orthogonal reference frame (O, X, Y, Z) is defined in which X is an axis parallel to the optical axis X′, oriented toward the outer main face, Z is an axis normal to the optical axis, the axis Y is normal to X in a plane containing P0 oriented toward a top of the vehicle glazing, Z is normal to P0, T being in a plane P0 passing through O and C or Tv, which is a virtual point of contact, is defined as being a projection of T in said plane P0, w being the distance according to X and algebraic in the plane P0 from T or Tv and h is a distance according to Y in the plane P0 between C and T or Tv, the input main face of the insert having an inclination defined by an angle α with respect to X,, wherein a first straight line Dt1 is defined, y
     =
     
      
       
        -
        
         tan
         ⁡
         (
         
          θ
          2
         
         )
        
       
       ⁢
       x
      
      +
      
       
        
         (
         
          
           cos
           ⁢
             
           α
           ⁢
             
           
            tan
            ⁡
            (
            
             θ
             2
            
            )
           
          
          -
          
           sin
           ⁢
             
           α
          
         
         )
        
        [
        
         
          
           D
           i
          
          ⁢
          
           
            1
            -
            
             
              1
              
               n
               2
              
             
             ⁢
             
              
               cos
               2
              
              (
              
               α
               -
               
                θ
                2
               
              
              )
             
            
           
          
         
         -
         
          2
          ⁢
          
           e
           n
          
          ⁢
          
           cos
           ⁡
           (
           
            α
            -
            
             θ
             2
            
           
           )
          
         
        
        ]
       
       
        2
        ⁢
        
         
          1
          -
          
           
            1
            
             n
             2
            
           
           ⁢
           
            
             cos
             2
            
            (
            
             α
             -
             
              θ
              2
             
            
            )
           
          
         
        
       
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      49
     
     ], a second straight line Dt2 is defined, y
     =
     
      
       
        tan
        ⁡
        (
        
         θ
         2
        
        )
       
       ⁢
       x
      
      +
      
       
        
         D
         i
        
        2
       
       [
       
        
         cos
         ⁢
           
         α
         ⁢
           
         
          tan
          ⁡
          (
          
           θ
           2
          
          )
         
        
        +
        
         sin
         ⁢
           
         α
        
       
       ]
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      50
     
     ], Dt1 and Dt2 are secant at C0 (xC0, yC0) with, x
      
       c
       o
      
     
     =
     
      -
      
       
        
         sin
         ⁢
           
         
          α
          [
          
           
            
             D
             i
            
            ⁢
            
             
              1
              -
              
               
                1
                
                 n
                 2
                
               
               ⁢
               
                
                 cos
                 2
                
                (
                
                 α
                 -
                 
                  θ
                  2
                 
                
                )
               
              
             
            
           
           -
           
            
             e
             n
            
            ⁢
            
             cos
             ⁡
             (
             
              α
              -
              
               θ
               2
              
             
             )
            
           
          
          ]
         
        
        +
        
         
          e
          n
         
         ⁢
         cos
         ⁢
           
         α
         ⁢
           
         
          tan
          ⁡
          (
          
           θ
           2
          
          )
         
         ⁢
         
          cos
          ⁡
          (
          
           α
           -
           
            θ
            2
           
          
          )
         
        
       
       
        2
        ⁢
        
         tan
         ⁡
         (
         
          θ
          2
         
         )
        
        ⁢
        
         
          1
          -
          
           
            1
            
             n
             2
            
           
           ⁢
           
            
             cos
             2
            
            (
            
             α
             -
             
              θ
              2
             
            
            )
           
          
         
        
       
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      51
     
     ]
    
   
  
 

 
  
   
    
     	
     
      
       y
       
        C
        ⁢
        0
       
      
      =
      
       
        
         tan
         ⁡
         (
         
          θ
          2
         
         )
        
        ⁢
        
         x
         
          C
          ⁢
          0
         
        
       
       +
       
        
         
          D
          i
         
         2
        
        [
        
         
          cos
          ⁢
            
          α
          ⁢
            
          
           tan
           ⁡
           (
           
            θ
            2
           
           )
          
         
         +
         
          sin
          ⁢
            
          α
         
        
        ]
       
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      52
     
     ], a third straight line Dt3 is defined

y=−tan(α)(x+w)−h  [Math 53], Dt1 and Dt3 are secant at E(xE,yE),, Dt2 and Dt3 are secant at F(xF,yF), x
       F
      
      =
      
       -
       
        
         
          
           D
           I
          
          ⁢
          cos
          ⁢
            
          α
          ⁢
            
          tan
          ⁢
          
           θ
           2
          
         
         +
         
          
           D
           I
          
          ⁢
          sin
          ⁢
            
          α
         
         +
         
          2
          ⁢
          w
          ⁢
            
          tan
          ⁢
            
          α
         
         +
         
          2
          ⁢
          h
         
        
        
         2
         ⁢
         
          (
          
           
            tan
            ⁢
              
            α
           
           +
           
            tan
            ⁢
            
             θ
             2
            
           
          
          )
         
        
       
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      54
     
     ]
    
   
  
 

 
  
   
    
     	
     
      
       y
       F
      
      =
      
       
        
         tan
         ⁡
         (
         
          θ
          2
         
         )
        
        ⁢
        
         x
         F
        
       
       +
       
        
         
          D
          i
         
         2
        
        [
        
         
          cos
          ⁢
            
          α
          ⁢
            
          
           tan
           ⁡
           (
           
            θ
            2
           
           )
          
         
         +
         
          sin
          ⁢
            
          α
         
        
        ]
       
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      55
     
     ]
    
   
  
 

 
  
   
    
     
      x
      E
     
     =
     
      -
      
       
        
         
          
           (
           
            
             cos
             ⁢
               
             α
             ⁢
               
             
              tan
              ⁡
              (
              
               θ
               2
              
              )
             
            
            -
            
             sin
             ⁢
               
             α
            
           
           )
          
          [
          
           
            
             D
             i
            
            ⁢
            
             
              1
              -
              
               
                1
                
                 n
                 2
                
               
               ⁢
               
                
                 cos
                 2
                
                (
                
                 α
                 -
                 
                  θ
                  2
                 
                
                )
               
              
             
            
           
           -
           
            2
            ⁢
            
             e
             n
            
            ⁢
            
             cos
             ⁡
             (
             
              α
              -
              
               θ
               2
              
             
             )
            
           
          
          ]
         
         
          2
          ⁢
          
           
            1
            -
            
             
              1
              
               n
               2
              
             
             ⁢
             
              
               cos
               2
              
              (
              
               α
               -
               
                θ
                2
               
              
              )
             
            
           
          
         
        
        +
        
         w
         ⁢
           
         tan
         ⁢
           
         α
        
        +
        h
       
       
        
         tan
         ⁢
           
         α
        
        -
        
         tan
         ⁢
         
          θ
          2
         
        
       
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      56
     
     ]
    
   
  
 

 
  
   
    
     	
     
      
       y
       E
      
      =
      
       
        
         -
         
          tan
          ⁡
          (
          α
          )
         
        
        ⁢
        
         (
         
          
           x
           E
          
          +
          w
         
         )
        
       
       -
       h
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      57
     
     ], xC being a negative value, yC being a positive value,, wherein, in a case a)

yF>yC0>yE, C(xC,yC) is inside a triangle of vertices C0(xC0,yC0) F(xF,yF) and E(xE,yE), at least 50% of the pupil being positioned in said triangle by including E; or, in a case b), when

|xC0|<|xF|  [Math 58], then yC<(yC0+5 mm), a point K of intersection is then defined between a straight line y=yC0 and Dt3 therefore, x
      K
     
     =
     
      w
      -
      
       
        
         y
         
          C
          ⁢
          0
         
        
        -
        h
       
       
        tan
        ⁡
        (
        α
        )
       
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      59
     
     ]
    
   
  
 

 
  
   
    
     
      y
      K
     
     =
     
      y
      
       C
       ⁢
       0
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      60
     
     ]
    
   
  
 

 
  
   
    
     |
     
      
       x
       K
      
      -
      
       x
       
        C
        ⁢
        0
       
      
     
     |
     
      <
      
       10
       ⁢
          
       
        mm
        .
       
      
     
    
   
   
    
     [
     
      Math
      ⁢
         
      61
     
     ]