Ricoh PJ WX3131 Benutzerhandbuch

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Preparations
a (min length) = Projection size (inches) - 0.795
 
32.885
a (max length) = Projection size (inches) - 0.673
 
27.397
Projection 
size
Projection distance 
a
Height (
H)
min length 
(zooming max)
max length
 (zooming min)
  30 inches   0.89 m (.9 ft.)   1.07 m (3.51 ft.)
6.50 cm (0.1 ft.)
  40 inches   1.19 m (3.90 ft.)   1.44 m (4.7 ft.)
8.70 cm (0.9 ft.)
  50 inches   1.50 m (4.9 ft.)   1.80 m (5.91 ft.) 10.90 cm (0.36 ft.)
  60 inches   1.80 m (5.91 ft.)   .17 m (7.1 ft.) 13.10 cm (0.43 ft.)
  70 inches   .10 m (6.89 ft.)   .53 m (8.30 ft.) 15.0 cm (0.50 ft.)
  80 inches   .41 m (7.91 ft.)   .90 m (9.51 ft.) 17.40 cm (0.57 ft.)
  90 inches   .71 m (8.89 ft.)   3.6 m (10.70 ft.) 19.60 cm (0.64 ft.)
 100 inches   3.0 m (9.91 ft.)   3.63 m (11.91 ft.) 1.80 cm (0.7 ft.)
 10 inches  3.63 m (11.91 ft.)   4.36 m (14.30 ft.) 6.10 cm (0.86 ft.)
 150 inches  4.54 m (14.90 ft.)   5.45 m (17.88 ft.) 3.70 cm (1.07 ft.)
 00 inches  6.06 m (19.88 ft.)   7.8 m (3.88 ft.) 43.50 cm (1.43 ft.)
 50 inches  7.58 m (4.87 ft.)   9.10 m (9.86 ft.) 54.40 cm (1.78 ft.)
 300 inches  9.10 m (9.86 ft.)  10.93 m (35.86 ft.) 65.30 cm (.14 ft.)
90°
As seen from above
As seen from the side
Screen
Lens center
a
90°
Projection Distance and Size
Use the figures, tables, and formulas below to determine the projection size and projection distance. 
(Projection sizes are approximate values for full-size picture with no keystone adjustment.)
a is the distance (m, feet) between the 
lens and the screen, and corresponds 
to a range of 0.89 m (.9 ft.) to 10.93 
m (35.86 ft.). 
H is the height from the 
image bottom to the center of the lens.
PJ X3131
a (min length) = Projection size (inches) - 0.758
 
31.022
a (max length) = Projection size (inches) - 0.643
 
25.845
Projection 
size
Projection distance 
a
min length 
(zooming max)
max length
 (zooming min)
  30 inches   0.94 m (3.08 ft.)   1.14 m (3.74 ft.)
  40 inches   1.7 m (4.17 ft.)   1.5 m (4.99 ft.)
  50 inches   1.59 m (5. ft.)   1.91 m (6.7 ft.)
  60 inches   1.91 m (6.7 ft.)   .30 m (7.55 ft.)
  70 inches   .3 m (7.3 ft.)   .68 m (8.79 ft.)
  80 inches   .55 m (8.37 ft.)   3.07 m (10.07 ft.)
  90 inches   .88 m (9.45 ft.)   3.46 m (11.35 ft.)
 100 inches  3.0 m (10.50 ft.)   3.84 m (1.60 ft.)
 10 inches  3.84 m (1.60 ft.)   4.6 m (15.16 ft.)
 150 inches  4.81 m (15.78 ft.)   5.78 m (18.96 ft.)
 00 inches  6.4 m (1.06 ft.)   7.71 m (5.30 ft.)
 50 inches  8.03 m (6.35 ft.)   9.65 m (31.66 ft.)
 300 inches  9.65 m (31.66 ft.)  11.58 m (37.99 ft.)
PJ WX3131
90°
As seen from above
As seen from the side
Screen
Lens center
90°
a
a is the distance (m, feet) between the 
lens and the screen, and corresponds 
to a range of 0.94 m (3.08 ft.) to11.58 m 
(37.99 ft.).
The lens center is in the same level with 
an image bottom.