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|
Project: /_project.yaml
Book: /_book.yaml
{% include "_versions.html" %}
<!--
Copyright 2018 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
# Wide Field of View (WFoV) ITS-in-a-Box Assembly
Android {{ androidPVersionNumber }} introduces ITS-in-a-box revision 2, an
automated test system for both wide field of view (WFoV) and regular field of
view (RFoV) camera systems in the Camera Image Test Suite (ITS). Revision 1 was
designed to test mobile device cameras with an FoV less than 90 degrees
(RFoV). Revision
2 is designed to also test cameras that have an FoV greater 90 degrees (WFoV),
enabling you to use one ITS-in-a-box system to test different cameras with
varying FoVs.
The ITS-in-a-box system consists of a plastic box laser cut from computer-aided
design (CAD) drawings, an internal lighting system, a chart tablet, and a device
under test (DUT). You can purchase an ITS-in-a-box or build your own.
Note: For details on building ITS-in-a-box revision 1 (designed for RFoV cameras
only), see
[ITS-in-a-Box Assembly](/compatibility/cts/camera-its-box-assembly).
## Purchasing a WFoV ITS-in-a-box
We recommend purchasing a WFoV ITS-in-a-box from one of the following qualified
vendors.
* *Acu Spec, Inc.*
990 Richard Ave, Ste 103, Santa Clara, CA 95050
fred@acuspecinc.com
* *MYWAY, Inc*
4F., No. 163, Fu Ying Rd., New Taipei City, Taiwan
sales@myway.tw
## Building a WFoV ITS-in-a-box
This section includes step-by-step instructions for assembling a WFoV
ITS-in-a-box (revision 2) that can test cameras with a wide field of view
(greater than 90 degrees).
### Overview
The WFoV ITS-in-a-box consists of a device under test (DUT), a chart tablet, an
internal lighting system, and a plastic box that is laser cut from CAD drawings
(shown in Figure 1).
{: width="800"}
**Figure 1.** Mechanical drawing of WFoV ITS-in-a-box
### Required tools
Before getting started, ensure you have downloaded the
[technical drawings for the WFoV ITS-in-a-box](/compatibility/cts/wfov_its_box_assembly_2.6.zip),
cut the plastic and vinyl pieces, purchased the hardware
from the BOM, and have the following tools available:
+ Phillips head screwdriver
+ Pliers
+ Wire cutters
+ Scissors
+ Water spray bottle
+ X-acto knife
### Step 1: Apply colored vinyl
To apply colored vinyl:
1. Apply colored vinyl on the smooth side of the acrylonitrile butadiene
styrene (ABS) and cut out the necessary openings as shown in Figure 1. Make
sure to apply the white vinyl with the large rectangular opening on the
tablet side and the black vinyl with the circular opening on the mobile
device side of the box. For more information, see
[wikiHow](https://www.wikihow.com/Install-a-Vinyl-Graphic){: .external}.
{: width="500"}
**Figure 2.** ABS pieces with vinyl applied on the smooth side (interior of
the box)
### Step 2: Assemble and install the light rail
To assemble and install the light frame structure with LED light strips:
1. Review the mechanical drawing of the light frame structure.
{: width="800"}
**Figure 3.** Light frame structure with LED light strips
1. Gather the plastic light baffles, light mounts, LED light strip, and zip
ties.
{: width="350"}
**Figure 4.** Light baffles, light mounts, LED light strips, and zip ties
1. Snap the plastic light baffles to the light mounts as shown in figure 5.
This should be a tight fit.
{: width="350"}
**Figure 5.** Plastic light baffles fitted in light mounts
1. Snap the light mounts to the side panels as shown in figure 6. When
complete, the light will shine towards the front corners of the box
interior.
{: width="350"}
**Figure 6.** Light baffles and mounts snapped onto the side panels
1. Assemble the side panels. (Optional: Sand the edges of the baffles for
a better fit.)
{: width="350"}
**Figure 7.** Side panels assembled and screwed together
1. Wrap the LED strip on the side facing the panel, between the holes used for
fastening. (Optional: Use the tape on the back of the LED light strip for
easier wrapping.)
{: width="350"}
**Figure 8.** LED light strip wrapped around the baffles
1. Wrap the light strips around the baffles twice, use zip ties to tie down the
strip, and snap the ends together.
{: width="350"}
**Figure 9.** Zip ties holding the LED light strips in place
{: width="350"}
**Figure 10.** LED lights wrapped around the baffles twice and exiting
through side exit
{: width="350"}
**Figure 11.** Zip ties showing on the side facing up. LED strips are on the
other side.
### Step 3: Assemble tablet and phone mounts
To assemble the tablet and phone mounts:
1. Review the mechanical drawing of the tablet mount.
{: width="800"}
**Figure 12.** Mechanical drawing of tablet mount
1. Gather the parts as shown in figure 13.
{: width="350"}
**Figure 13.** Tablet and phone mounts with screws, plungers, vinyl caps,
and nuts
1. Cut the push-on vinyl cap by ⅓ of its length and push it onto the end of the
plunger. This ensures the plunger mechanism can be retracted and locked.
{: width="350"}
**Figure 14.** Plunger with adjusted push-on cap
1. Screw the plungers onto the mounts.
{: width="350"}
**Figure 15.** Tablet and phone mounts with plungers attached
### Step 4: Final assembly
To assemble the WFoV ITS box:
1. Gather the front aperture plates and screw the smaller plate with the square
on top of the larger plate as shown in figure 16.
{: width="500"}
**Figure 16.** Front aperture plates screwed together with 4-40 screws
1. Tape the front and back panels to the rest of the box.
{: width="350"}
**Figure 17.** WFoV box with sides screwed together and the front and back
panels taped
1. Check that the power adapter is 12V, 5A. Anything below 12V will not work;
anything below 5A may affect the brightness level of the lights.
{: width="350"}
**Figure 18.** 12V, 5A power adapter
1. Using a digital lux tester, test the lux of the LED lights to make sure they
are at the appropriate level. The YF-1065 by
[Contempo Views](https://www.contempoviews.com/){: .external}
is used in this example.
{: width="350"}
**Figure 19.** YF-1065 by Contempo Views
1. Place the light meter on the tablet side and turn it to 2000 lux to measure
the light. The lux should be around 100 to 130. Anything significantly lower
will be too dim for the tests and can lead to test failures.
{: width="350"}
**Figure 20.** Lux meter measuring light from the side with tablet mount
1. Follow the appropriate step depending on the lux value measured:
* If the light is at the correct level, screw the front and back plates into
place.
* If the light is not at the correct level, check the LED and power supply
part number.
1. Mount the phone mount on the aperture plate and the tablet mount on the
opposite side with screws and nuts.
{: width="500"}
**Figure 21.** Phone mount (left) and tablet mount (right)
{: width="500"}
**Figure 22.** Assembled WFoV box: rear view (left) and front view (right)
|
